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Slang for LSD (d-Lysergic Acid Diethylamide). It is a shortened form of "acid."
Hey man got any 'cid?
cid by Adam C. July 11, 2003
Related Words
cid • cider • cidiot • cidney • Cidnie • cidra • CiDAL • Ciddle • cide • CideM
UK’s Crime Investigation Department
Central Cee Loading - Fuck sake, you must be joking, CIDs outside of the cut, patrollin'
CID by L3gion Legacy February 4, 2021
Drug slang term for lsd, or "acid". Considered by myself to be one of the most useless and stupid terms because it is only one letter away from the actual name of the drug, duh.
Mike took two blotter tabs of that cid and was tripping out for 12 hours.
cid by d.roc January 4, 2007
Crime Investigation Department: UK undercover police officers, a.k.a 'Cunts In Disguise'
'the fuckin CID (cunts in disguise) were tryin ta follow us, so we lead them down an alley and ambushed them haha'
CID by fuckyourpickysystem November 15, 2005
Escort term meaning 'Cum In Deep'.
The escort lets you cum inside her with no condom.
she loved it when i CID.
cid by i'm-rick-also December 19, 2008
A guy who apears in every final fantasy game and usually has something to do with airships
Tidus: wow shit to much machina
Wakka: Cid better get his big airship butt down here quick ya?
Cid by D-nd October 18, 2004
More from Urban Dictionary
The phenomenon where adults salivate at children's toys
Every time I walk into the toy aisle, I catch myself kidulting over the latest action figures and LEGO sets!
kidulting by Emotional Cruiser October 12, 2025
Word of the Day on October 4, 2026
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
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