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mon the biff 

"Mon" is "come on" in Scottish. "The Biff" is what fans call the Scottish rock band "Biffy Clyro". Mon the biff therefor means something like "Come on Biffy Clyro". Fans scream this at concerts just before the show and in between songs.
mon the biff by TheLastCrusade October 31, 2013

Mon the bishy 

A common chant used by members of the Bishopbriggs nationalist contingent (TBC). Literally translated to "Come on the Bishopbriggs", is a chant of pride calling for the independence of Bishopbriggs from it's local authority.

From the Scottish town of Bishopbriggs
Mon the bishy by MuffDiver420 May 15, 2019

Mon The Con 

An expression given to an individual who on the surface, seems nice/normal. This isn’t the case however... Over time you’ll begin to notice a shift in their personality. They’ve create a false persona to smokescreen their true, evil intentions.

This term is used to describe someone who shrouds themselves in their own lies, in order to fool people into believing that they’re someone that they’re not.

Con Artists! (Kinda)
Sterry:

I’ve known Ben for a long time now, but recently his true colours have really started to show. He’s now super creepy and gross. He wasn’t like this before.

Elwood:

Sounds like a classic case of

Mon The Con dude!

Harvard on the Mon 

Is another name for Cal U. Mon refers to the Monongahela River that is right next to the University. There’s not much to do at Harvard on the Mon but you can always count on the train going by when you’re in a rush and on your way in or out of the River Lot.
“So I keep hearing students call this place ‘Harvard on the Mon’ what does that even mean?” “I have no fucking clue man.”
Pittsburghese for the Monongahela River, one of the famous "Three Rivers" that, along with the Allegheny and the Ohio, runs through the 'Burgh. Can also refer to the Mon Incline.
I took the Mon up to Mt. Washington enat.
the Mon by emsee November 16, 2006

Jon The Mon

Jon the Mon is a full time Twitch streamer who does not have autism. Also, Lewis Reed is a stupid little cunt.
Wow, that Jon the Mon guy doesn't have autism
Jon The Mon by C4esar February 1, 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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