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10 Latin Phrases People Pretend to Understand

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By Kevin Fleming

Whether you're deciphering a cryptic state seal or trying to impress your Catholic in-laws, knowing some Latin has its advantages. But the operative word here is "some." We'll start you off with 10 phrases that have survived the hatchet men of time (in all their pretentious glory).

1. Caveat Emptor
"Let the buyer beware"

Before money-back guarantees and 20-year warranties, caveat emptor was indispensable advice for the consumer. These days, it'd be more fitting to have it tattooed on the foreheads of used-car salesmen, infomercial actors, and prostitutes. For extra credit points, remember that caveat often makes solo appearances at cocktail parties as a fancy term for a warning or caution. Oh, and just so you know, caveat lector means "let the reader beware."

2. Persona Non Grata
"An unacceptable person"

Remember your old college buddy, the one everybody called Chugger? Now picture him at a debutante ball, and you'll start to get a sense of someone with persona non grata status. The term is most commonly used in diplomatic circles to indicate that a person is unwelcome due to ideological differences or a breach of trust. Sometimes, the tag refers to a pariah, a ne'er-do-well, a killjoy, or an interloper, but it's always subjective. Back in 2004, Michael Moore was treated as persona non grata at the Republican National Convention. Bill O'Reilly would experience the same at Burning Man.

3. Habeas Corpus
"You have the body"

In a nutshell, habeas corpus is what separates us from savages. It's the legal principle that guarantees an inmate the right to appear before a judge in court, so it can be determined whether or not that person is being lawfully imprisoned. It's also one of the cornerstones of the American and British legal systems. Without it, tyrannical and unjust imprisonments would be possible. In situations where national security is at risk, however, habeas corpus can be suspended.

4. Cogito Ergo Sum
"I think, therefore I am"

When all those spirited mental wrestling matches you have about existentialism start growing old (yeah, right!), you can always put an end to the debate with cogito ergo sum. René Descartes, the 17th-century French philosopher, coined the phrase as a means of justifying reality. According to him, nothing in life could be proven except one's thoughts. Well, so he thought, anyway.

5. E Pluribus Unum
"Out of many, one"

America's original national motto, e pluribus unum, was plagiarized from an ancient recipe for salad dressing. In the 18th century, haughty intellectuals were fond of this phrase. It was the kind of thing gentlemen's magazines would use to describe their year-end editions. But the term made its first appearance in Virgil's poem "Moretum" to describe salad dressing. The ingredients, he wrote, would surrender their individual aesthetic when mixed with others to form one unique, homogenous, harmonious, and tasty concoction. As a slogan, it really nailed that whole cultural melting pot thing we were going for. And while it continues to appear on U.S. coins, "In God We Trust" came along later (officially in 1956) to share the motto spotlight.

6. Quid Pro Quo
"This for that"

Given that quid pro quo refers to a deal or trade, it's no wonder the Brits nicknamed their almighty pound the "quid." And if you give someone some quid, you're going to expect some quo. The phrase often lives in the courtroom, where guilt and innocence are the currency. It's the oil that lubricates our legal system. Something of a quantified value is traded for something of equal value; elements are parted and parceled off until quid pro quo is achieved.

7. Ad Hominem
"To [attack] the man"

In the world of public discourse, ad hominem is a means of attacking one's rhetorical opponent by questioning his or her reputation or expertise rather than sticking to the issue at hand. Translation: Politicians are really good at it. People who resort to ad hominem techniques are usually derided as having a diluted argument or lack of discipline. If pressed, they'll brandish it like a saber and refuse to get back to the heart of the matter. Who said the debate team doesn't have sex appeal?

8. Ad Majorem Dei Gloriam
"All for the Greater Glory of God"

Ad majorem dei gloriam is often shortened to AMDG. In other words, it's the WWJD of the Jesuits, who've been drilling the mantra into their followers since (Saint) Ignatius of Loyola founded the Catholic Order in 1534. They believe all actions, big or small, should be done with AMDG in mind. Remind your Jesuit-educated buddies of this when they seem to be straying from the path. (Best used with a wink and a hint of irony.)

9. Memento Mori
"Remember, you will die"

Carpe diem is so 20th century. If you're going to suck the marrow out of life, trying doing it with the honest, irrefutable, and no less inspiring memento mori. You can interpret the phrase in two ways: Eat, drink, and party down. Or, less hedonistically, be good so you can get past the pearly gates. Naturally, the latter was the one preferred by the early Christian Church, which would use macabre art—including dancing skeletons and snuffed-out candles—to remind the faithful to forgo temporal pleasures in favor of eternal bliss in heaven.

10. Sui Generis
"Unique and unable to classify"

Frank Zappa, the VW Beetle, cheese in a can: Sui generis refers to something that's so new, so bizarre, or so rare that it defies categorization. Granted, labeling something sui generis is really just classifying the unclassifiable. But let's not over-think it. Use it at a dinner party to describe Andy Kaufman, and you impress your friends. Use it too often, and you just sound pretentious.

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A New App Interprets Sign Language for the Amazon Echo
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The convenience of the Amazon Echo smart speaker only goes so far. Without any sort of visual interface, the voice-activated home assistant isn't very useful for deaf people—Alexa only understands three languages, none of which are American Sign Language. But Fast Company reports that one programmer has invented an ingenious system that allows the Echo to communicate visually.

Abhishek Singh's new artificial intelligence app acts as an interpreter between deaf people and Alexa. For it to work, users must sign at a web cam that's connected to a computer. The app translates the ASL signs from the webcam into text and reads it aloud for Alexa to hear. When Alexa talks back, the app generates a text version of the response for the user to read.

Singh had to teach his system ASL himself by signing various words at his web cam repeatedly. Working within the machine-learning platform Tensorflow, the AI program eventually collected enough data to recognize the meaning of certain gestures automatically.

While Amazon does have two smart home devices with screens—the Echo Show and Echo Spot—for now, Singh's app is one of the best options out there for signers using voice assistants that don't have visual components. He plans to make the code open-source and share his full methodology in order to make it accessible to as many people as possible.

Watch his demo in the video below.

[h/t Fast Company]

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How to Craft the Perfect Comeback, According to Experts
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In a 1997 episode of Seinfeld called “The Comeback,” George Costanza is merrily stuffing himself with free shrimp at a meeting. His coworker mocks him: “Hey, George, the ocean called. They’re running out of shrimp.” George stands humiliated as laughter fills the room, his mind searching frantically for the perfect riposte.

It’s only later, on the drive home, that he thinks of the comeback. But the moment has passed.

The common human experience of thinking of the perfect response too late—l’esprit de l’escalier, or "the wit of the staircase"—was identified by French philosopher Denis Diderot when he was so overwhelmed by an argument at a party that he could only think clearly again once he’d gotten to the bottom of the stairs.

We've all been there. Freestyle rappers, improv comedians, and others who rely on witty rejoinders for a living say their jobs make them better equipped to seize the opportunity for clever retorts in everyday life. They use a combination of timing, listening, and gagging their inner critics. Here are their insights for crafting the perfect comeback.

LISTEN TO YOUR OPPONENT’S ARGUMENT.

The next time you’re in a heated conversation, be less focused on what you're about to say and more attentive to what you're actually responding to. When you spend more time considering what your sparring partner is saying, “you’re deferring your response until you’ve fully heard the other person," Jim Tosone, a technology executive-turned-improv coach who developed the Improv Means Business program, tells Mental Floss. Your retorts may be more accurate, and therefore more successful, when you’re fully engaged with the other person’s thoughts.

DON’T THINK TOO MUCH.

According to Belina Raffy, the CEO of the Berlin-based company Maffick—which also uses improv skills in business—not overthinking the situation is key. “You’re taking yourself out of unfolding reality if you think too much,” she tells Mental Floss. It’s important to be in the moment, and to deliver your response to reflect that moment.

TRAIN THAT SPONTANEOUS MENTAL MUSCLE.

History’s most skilled comeback artists stored witticisms away for later use, and were able to pull them out of their memory at the critical time.

Winston Churchill was known for his comebacks, but Tim Riley, director and chief curator at the National Churchill Museum in Fulton, Missouri, tells Mental Floss that many of his burns were borrowed. One of his most famous lines was in response to politician Bessie Braddock’s jab, “Sir, you are drunk.” The prime minister replied, “And you, Bessie, are ugly. But I shall be sober in the morning, and you will still be ugly.”

Riley says this line was copied from comic W.C. Fields. Nevertheless, it took quick thinking to remember and reshape the quote in the moment, which is why Churchill was thought of as a master of timing. “It was an off-the-cuff recall of something he had synthesized, composed earlier, and that he was waiting to perform,” Riley says.

But in some situations, the retort must be created entirely in the moment. Training for spontaneity on stage also helps with being quicker-witted in social situations, New York City battle rap emcee iLLspokinn tells Mental Floss. It’s like working a spontaneous muscle that builds with each flex, so, you’re incrementally better each time at seizing that witty opportunity.

MUZZLE YOUR INNER CRITIC.

Anyone who has been in the audience for an improv show has seen how rapidly performers respond to every situation. Improv teaches you to release your inhibitions and say what drops into your mind: “It’s about letting go of the need to judge ourselves,” Raffy explains.

One way to break free of your internal editor might be to imagine yourself on stage. In improv theater, the funniest responses occur in the spur of the moment, says Douglas Widick, an improv performer who trained with Chicago’s Upright Citizens Brigade. By not letting one’s conscience be one’s guide, actors can give into their “deepest fantasies” and say the things they wouldn’t say in real life.

IF YOU HAVE AN EXTRA SECOND, HONE YOUR ZINGER.

The German version of Diderot’s term is Treppenwitz, also meaning the wit of the stairs. But the German phrase has evolved to mean the opposite: Something said that, in retrospect, was a bad joke. When squaring up to your rival, the high you get from spearing your opponent with a deadly verbal thrust can be shadowed by its opposite, the low that comes from blurting out a lame response that lands like a lead balloon.

That's a feeling that freestyle rapper Lex Rush hopes to avoid. “In the heat of the battle, you just go for it,” she tells Mental Floss. She likens the fight to a “stream of consciousness” that unfolds into the mic, which leaves her with little control over what she’s projecting into the crowd.

It may help to mull over your retort if you have a few extra seconds—especially if you’re the extroverted type. “Introverts may walk out of a meeting thinking, ‘Why didn’t I say that?’ while extroverts think, ‘Why did I say that?’” Tosone, the improv coach, says. Thinking before you speak, even just briefly, will help you deploy a successful comeback.

And if it doesn’t go your way, iLLspokinn advises brushing off your missed opportunity rather than dwelling on your error: “It can be toxic to hold onto it."

THROW DIGITAL SHADE ACCORDING TO THE SAME RULES—BUT BE QUICK ABOUT IT.

Texting and social media, as opposed to face-to-face contact, give you a few extra minutes to think through your responses. That could improve the quality of your zinger. “We’re still human beings, even on screens. And we prefer something that is well-stated and has a fun energy and wit about it," Scott Talan, a social media expert at American University, tells Mental Floss.

But don't wait too long: Replies lose their punch after a day or so. “Speed is integral to wit, whether in real life or screen life,” Talan says. “If you’re trying to be witty and have that reputation, then speed will help you."

Some companies have excelled in deploying savage social media burns as marketing strategies, winning viral retweets and recognition. The Wendy’s Twitter account has become so well known for its sassy replies that users often provoke it. “Bet you won’t follow me @Wendys,” a user challenged. “You won that bet,” Wendy’s immediately shot back.

George Costanza learns that lesson when he uses his rehearsed comeback at the next meeting. After his colleague repeats his shrimp insult, George stands and proudly announces, “Oh yeah? Well, the jerk store called, and they’re running out of you!”

There’s silence—until his nemesis comes back with a lethal move: “What’s the difference? You’re their all-time best-seller.”

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