Complement 

To go well with; to complete.

That lamp complements your desk perfectly.

Complement by Diggity Monkeez March 3, 2005

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 by bbbbbbbjdmd,xdmxmxmmmxlsssjjs5 November 22, 2019

Complement 

To highly insult someone or something

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

National complement a girl day by Joshua6969 January 18, 2020