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On Ya Head 

When someone says something crazy, out of line, irrational, or simply makes a joke. Originates from Thugboss Nation in Triple D, Tx
Ex. 1
Guy 1: "Say bro Monique sexy for a fat bitch"
Guy 2: "Boy on ya head. Hell to the muthafuckin naw."

Ex. 2
Girl 1: "Girl I'm bout to hit the cluuuubbb and dance like a strippa!"
Girl 2: "On ya head you know yo skinny ass can't twerk."
On Ya Head by Statmanblast May 6, 2011

on ya bike 

Usually means 'fuck off', 'get away', 'ya lying'. Mostly used by scousers (Liverpool, UK).
smackhead -'av ya got any ciggys lad?'
lad - 'on ya bike!'
on ya bike by samwichh! March 25, 2008

on ya cunt 

steve- achoo!
joel- on ya cunt
steve- love you man

On Ya Boat 

When you want someone to go away, and both of you are caught in a flood.
Person 1: "We need bread."
Person 2: "Alright, on ya boat then!"
On Ya Boat by scottyftw January 24, 2011

on ya backs 

calling out domino in a game of domino's. Being the first to rid their hand of domino's. requesting the other players to reveal their remaining domino's.
"aight, I got domino... on ya backs!"
on ya backs by knowledge dread February 18, 2010

on ya ones 

A phrased used to ask/be asked if your alone.
"Alright bruv u on ya ones?"
on ya ones by bekiiboo92 May 22, 2008
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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