A ghetto synonym to flirt.
Flex sounds better in a song and has a more distinct flow to flirt.
Also it can be a conversation starter
Boy "Wassup shorty, mind if i flex with you?"
(normally if he said flirt, she'd slap him)
Girl "hey, whats flex?"
Boy "Well its...
20 minutes later they're having sex
1. The preliminary acts to beating someone's ass.
A flex occurs when a trick ass mark is being a silly bitch and he/she recieves the big show.
That mark ass trick just scuffed my shoes, I'm about to flex his bitch ass.
A primary subject of recieving flexxing would be Alain P. because that dumb beaner is always running his mouf.