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1. flexin'
to show off, as in flexing ones muscles.
"dat foo bout ta get jacked flexin dat joorey"(jewelry)
by hazzi Jan 11, 2003 add a video
2. Flexin'
1.)To show off or showboat muscles or materialistic goods.
2.)To lie
1.) I can't stand Mike, he's always flexin his muscles.
2.) Jacob: I got a whip on 24's.

Tina: For real?

Jacob's friend: That dude flexin'. He has a used Geo.
3. flexin'
A d.j. delivering a proper set on the turntables. We're "flexin" tonight.
by anonymous Sep 19, 2003 add a video
4. Flexin'
The act of sleeping with your friends girlfriends, female companions, or any other form of feminism they may have brought with them.
Boy 1: "Dude, I brought this girl with me."

Boy 2: "Watch out for Devonaire, he's got that flexin' look on his face."
5. flexin'
Stepping up to someone like you wanna throw down and fight.
"You flexin' fool, you flexin'?!!!"
by zacho Jan 9, 2003 add a video
6. flexin'
Lying, doing a horrible job, and you think everyone believes you.
Dat nigga Raquan flexin', he know he can't pull mo bitches den me.
7. flexin'
Playing with the trigger of a gun or other form of discharging weapon...
"I never wanted to hurt a nigga
Unless ya come flexin that trigga" - Cypress hill.
by TheLongestLine Jul 27, 2005 add a video
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