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batter on the brain 

When a male is thinking with his genitalia not clearly or logically. Baby batter (semen) clouds the thoughts in the brain.
Mate I can’t believe you slept with ***** you must have had batter on the brain
batter on the brain by MSDorset December 20, 2022

put the battery on

to hype somebody up by talking to them to do something for you
Im going to have to put the battery on my little sister to get my mother to buy the tickets to Disney World.
put the battery on by pinkrican June 15, 2007

There is a global pandemic going on and you’re worried about a banter fest. I’m definitely not going to attend, don’t know about the rest of you, but I care about my life 

The act of roasting physics teachers and messaging the whole sixth form about why attending a banter fest during a global pandemic is an inadvisable thing to do.
Physics teacher: Hey guys I organised a banter fest for you next Monday. It'll be really fun!
Sensible person: There is a global pandemic going on and you’re worried about a banter fest. I’m definitely not going to attend, don’t know about the rest of you, but I care about my life
Physics teacher: Oh I'm sorry I didn't...
Sensible person: There is a global pandemic going on and you’re worried about a banter fest. I’m definitely not going to attend, don’t know about the rest of you, but I care about my life
Physics teacher: *Leaves school to go live in a remote Siberian village*
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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