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Blackground Check 

The act of checking your surroundings for any black people prior to making a potentially insulting racist joke and getting beaten. Usually the joker will state they are making the check out loud, much to the hilarity of those familiar with the term.
Johnny: So this black guy walks into a bar... Wait, gotta do a blackground check....

Tim: Oh, that. LOL.

Johnny: Nope, no can do, there's one over there.
Blackground Check by Artien_04 August 10, 2009

Background check 

The one thing that stands between me and my job as a volunteer
poor little billy got rejected cuz they discovered his nudes from a background check
Background check by sergeant anous August 31, 2016

Background Check 

A popular euphemism for anal sex. First heard on the Allegheny College campus in Meadville, Pennsylvania.
I'm going to conduct an intensive background check on her tomorrow night.

Facebook Background Check 

When you meet someone online, (tinder, plenty of fish, ok Cupid, etc.) and you want to make sure they're not a total psycho before you meet them. So you look them up on Facebook to see what they post, who they're friends with, what pictures you haven't seen, etc. Sometimes you are surprised by what you find...
I was kind of skeptical about Todd, so I ran a Facebook background check to see who he really is...

Background check 

The background check is preformed while hitting it doggystyle. You take your right thump and insert it into her ass. Be sure to wiggle it around and get it nice and deep. When you remove your thumb it should have a good amount of poo on it. Now take your right thumb and put a poopy thumb print on her ass cheek. Similar to a live scan, DROS, or background check.
Background check by Mr. Brownfinger September 6, 2016

Background check 

The background check is preformed while hitting it doggystyle. You take your right thump and insert it into her ass. Be sure to wiggle it around and get it nice and deep. When you remove your thumb it should have a good amount of poo on it. Now take your right thumb and put a poopy thumb print on her ass cheek. Similar to a live scan, DROS, or background check.
Background check by Mr. Brownfinger September 6, 2016
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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