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avoid like the plague 

A phrased used when some one or thing is to be avoided at all cost.
avoid like the plague by Hans December 28, 2004

the plague

in a historical context, the plague often refers to the bubonic plague or "black death", also known as pestilence, which wiped out large portions of the population of Europe and Asia during the 14th and 15th centuries

in a modern vernacular context, the plague refers to someone being out with illness, most often a chest cold or flu, usually exaggerating the extent of one's illness while demonstrating their incapacity
Sara can't come in today, she's out with the plague
Okay then send her my condolences and tell her to get better soon!

The Bubonic plague, otherwise simply called the "plague", killed millions of people in medieval Europe
the plague by UM North Quad March 30, 2013

avoid like the plague 

If you see her avoid her like the plague. (example of avoid like the plague)

The Plague

A sickly and unidentifiable disease brought on by chronic marijuana use. Often augmented by nasty ass Whitman "beeshe(s)" and regularly going twenty deep.
"Hey man you wanna hit this "spleef?" Naw dude im on hiatus I have the plague. I just coughed up blood and urinated green today.
The Plague by BatmanB June 10, 2007

What the plague?!

An exclamation of surprise or confusion.

Made popular by the play "The School For Scandal".
Hey-- what the plague?!
What the plague?! by Thureris April 17, 2005

Avoid Pi Like the Plague

An ill-advised mantra math-anxious folks unquestionably take to heart on hearing it from negative or unhelpful people, who are only contaminating the minds of their listeners with fake mathematical information.
To tell someone to avoid pi like the plague is like telling them that π is a rational number because it can be expressed as the ratio of a circle’s circumference to its diameter.
More from Urban Dictionary
British slang for a scientist or technical expert, esp . when the speaker is not certain of the expert’s specific field of study. Not necessarily derogatory, but typically used by persons without a technical background. In the US, the equivalent would be “egghead”, “squint”, or “geek.”

Origin of the word is unknown. Started sometime in World War 2. Given the typical evolution of British slang, could easily have started because what these experts did was confusing or “baffling” to the common person.
According to the boffins downstairs, the murderer used a serrated blade.
Boffin by Agnon February 11, 2023
Word of the Day on October 3, 2026

Pee Calculus

When you have to pee in a movie but don’t want to miss anything, and must do the following mental equation: will the amount I have to pee cause enough discomfort to diminish my attention capacity for the remainder of the movie to an extent which is greater than the amount of the movie I would miss by making a mad dash to the restroom.
I saw Satantango last night, wonderful film but by the 5th hour I had to start doing pee calculus.
Pee Calculus by anorlondo October 1, 2026
Word of the Day on October 2, 2026
Literally "dirty" pronounced with a West Indian accent. Can also have a positive connotation, for example Sean Paul's album title "Dutty Rock".
"The girl is pretty but she corrupt and dutty!"

or, in a positive usage:

"Booya! That freestyle was dutty!"
Dutty by J Hall April 3, 2003
Word of the Day on October 1, 2026
korean word for madam, older woman
Ajumma wait a moment
Ajumma by aintnotinbutnice July 5, 2009
Word of the Day on September 30, 2026

Slop Grenade

When someone uses AI to generate a large document, slide deck, or piece of code/software and tosses it over the fence for you to deal with.
Chad: Hey Brent I sent you the new backend API change to review, it’s only 100 files changed.

Brent: he just tossed me a slop grenade
Slop Grenade by Joe Squid September 28, 2026
Word of the Day on September 29, 2026
Short-hand for the word floccinaucinihilipilification, meaning the estimation of something as valueless (encountered mainly as an example of one of the longest words in the English language).
After we broke up, he was floxi to me.
floxi by Dr. Geek May 13, 2009
Word of the Day on September 28, 2026
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