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complement 

In Math, the complement is, simply put, that which is outside of the defined region. However, this is often used as an insult in geek circles.
Geek 1:Your momma's so fat, that she's the complement of your house.

Geek 2: Yeah, well at least my penis isn't always the complement of a vagina.

Geek 1: *shoots self, thus becoming the complement of existing*
complement by Evariste Galois April 20, 2009

complement 

something you give to someone you like
something you add to food to improve its taste
She accepted the complement with good grace
complement by Philip Nash November 26, 2006

complement 

just in case your having a bad day....

-ur cute :)-
ur kinda cute

thx for the complement

Complement 

Today I complemented everyone at the park
Complement by I don’t September 26, 2022

Complement Poach 

When someone steals another persons complement that wasn't directed at them.
Jack "Suzie you look nice today"
Jill "Thank you"
Jack "Jill don't complement poach"
Complement Poach by AskACapperDOTcom September 16, 2009

National complement a girl day 

On national complement a girl day u complement a girl say she's pretty say she is nice
Randy:sup ur eyes are beautiful
Samantha:😚 thanks so much y do u say that
Randy:it's national complement a girl day
More from Urban Dictionary
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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