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Butt Muscle 

The name you give to a friend(or foe) , for being a dumbass.
DUDE!, i saw Matt talking to these hot chicks yesterday and he told me that he was busy, what a butt muscle!
Butt Muscle by D-Peezy February 27, 2009

Butt Muscle 

Douche Bag.
White Hat.
Poser.
D. Metzler From Baltimore Maryland
"Butt Muscle Is The New Douche Bag."
Butt Muscle by Windsah Clang August 21, 2009

Muscle Butt 

When your butt very strong. It doesn't jiggle but it is big. Also when you hit the but and it hits you back.
Ayo, you know that girl Tatianna. She really got a Muscle butt. It looks like it lifts the weight on weekends.
Muscle Butt by Lilyana Robinson April 23, 2019

muscle butt 

A girl who has a ass that is so muscular that if she wasn't muscular it would be straight flat
Damn maddys ass is so muscular she got a muscle butt
muscle butt by David Yeum May 16, 2016

muscle butt 

When a girl got a fatass and you got to stop and reevaluate your whole life.
Damn, that girl's got a fucking muscle butt!
muscle butt by Rams03 May 27, 2016

Muscle Butt 

A popular trend starting in late 2021 to current of females posing in tights or yoga pants highlighting their buttocks, usually in a gym or other athletic environment.
My IG feed is flooded with muscle butt photos.
Muscle Butt by Hype_813 December 19, 2023
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
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