Complmeated 

When a woman (or homosexual male) compliments a man’s member

Dude, she complmeated my Johnson!

Complmeated by BackJabber November 30, 2017

complementary flush 

flushing toilet right after a turd hits the water as to not stink up the bathroom for the next person

hurry up I gotta take a dump, and how about a complementary flush

complementary flush by somethree May 9, 2013

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

Complement 

To go well with; to complete.

That lamp complements your desk perfectly.

Complement by Diggity Monkeez March 3, 2005

Cute(Complement) 

A complement to a girl from another girl, in a non-homosexual way. When a girl calls another girl "cute" she's basically saying that they're sweet, nice, or used to refer to something little, or related to being young.

(People do this in my school, it's kind of a southern thing!)

Friend one: "You look so Cute(Complement) today, Your dress and hair is, like, adorable."
Friend two: "Thanks!"

Cute(Complement) by Deplrshukiwa April 8, 2013

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

complementary-fuck 

sex with your significant other when a breakup in your relationship is imminent

Although my girlfriend was seeing someone else, I still got to complementary-fuck her three times over the weekend.

complementary-fuck by drnkinjun July 1, 2011