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When you have such bad diarrhea that it feels like your cheeks are burning.
Hey man I had Taco Bell the other day and it gave me really bad arse-on.
Arse-on by 4we80m3 Mustache December 1, 2020

Warm arse on the lap 

Irish term. Another term for spooning.
Couldn’t get out of the bed this morning. There was a warm arse on the lap
Warm arse on the lap by Golden V January 4, 2025

Beer Before Grass Your On Your Arse, Grass Before Beer Your In The Clear

Beer Before Grass Your On Your Arse, Grass Before Beer Your In The Clear
Beer Before Grass Your On Your Arse, Grass Before Beer Your In The Clear

=
Get drunk and then smoke weed and you will be on your arse , smoke up first you will be fine all night

i will on my arse 

I have no intention of doing something,used usually in friendly company as answer to a request that involves doing something for someone else.
Will you get me some cigarettes in the shop? I will on my arse!!
i will on my arse by Julian O' October 20, 2006

Out on my arse 

Being kicked out of your home, left alone with no where to live, ie homeless
My mam has left me out on my arse
Out on my arse by Ambergumna6891 October 19, 2019

On his arse 

A male (female version is on her arse) who is very drunk, to the point where they need looking after, and is probably being sick or can’t walk .
He was on his arse, fucked off tequila
On his arse by Ambergumna6891 October 19, 2019
More from Urban Dictionary

square grouper

Nickname given to bales of marijuana thrown overboard or out of airplanes. Origin is reportedly from members of the US Coast Guard in the area of Southern Florida.
"Base we've got some square groupers floating outside of Miami harbor."
square grouper by slipsheet November 6, 2004
Word of the Day on October 7, 2026
A girl who does ballet and only talks about ballet. Her schedule is filled with dance classes which does not allow her to do any other activity.
"Hey, do you know that girl Sally?"

"Yeah, she's kind of annoying. All she ever talks about it ballet."

"Wow, what a Bunhead."

"Hey Sally, you want to hang out this weekend?"
"I can't, I have dance."
"You're such a Bunhead."

"Yeah... I know."
Bunhead by Jen00 October 24, 2014
Word of the Day on October 6, 2026

trucker's tan 

A sunburn or suntan focused on the left arm. It is caused by the left side of the body being the only half that gets exposed to sunlight while driving. Presumably, it would be located on the right side of the body in countries where they drive on the left side of the road.
I had a trucker's tan after driving for 10 straight hours on a sunny day.
Word of the Day on October 5, 2026
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
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