Flex

Tense your muscles like you want to fight.

Amanda flexed on my x because she is jealous we are back together.

by Phishsticks May 27, 2017

Flex

to masturbate; to pull oneself off; to manually ejaculate; to flex

"have you seen that flick where that guy flex's right into that bitch's ear?"

by Flexmaster Flux April 1, 2003

Flex

To snog

Bob: OMG she looked so buff 2 day
Jim: Did you flex her?
Bob: Yeah man all day in the park

by Dragonmaster24 October 23, 2009

Flex

The artform of smoking marijuana.
To smoke weed.
To hit green and such.

Originated in Union County NJ by the Strength Team. MUSCLE UP!!!!

Let's Flex some Green.
Wanna Flex?

by Slick Rick the Ruler December 22, 2004

Flex

South Florida term for a party or get together.

Have you heard about the flex tonight?

by KLCB May 17, 2019

Flex

A cross between a popular brand of toothpaste and the ever-ready sales assistant of WH Smith in Derby.

Flex, do you have the new issue of Tractor & Heritage Magazine?

by Well... October 17, 2004

Flex

Claiming you are the shit

Jack: I go to bed at 8
Jill:I go to bed at nine suck my penis
Jack: Jill you do not have a penis
Jill: nobody gives a fuck and stop flexing your penis

by One guy December 6, 2018