To make a statement. To clearly express yourself. Or to threaten in a verbal way, more so than in a physical way.
Oh you wanna FLEX? O.K., step outside I'll show you what's up!
by Ruz May 10, 2003
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Verb: To flex. To leave a place or area.
This place is boring, lets flex.
Also can be said, Lets bounce, see bounce.
by The Hack April 25, 2003
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A FLEX is when a man meets up with a women, with the intention of escalating the situation sexually with the goal of getting laid.

Often times flex's are arranged via the internet, with people who have never met in person before, but have pre-arranged to have sex via the mircale that is the internet.
Im going on a flex tonight.

OR

That flex last night was weak.

OR

The girl on that flex last night did not give me what I expected.
by TrickDa1a April 19, 2007
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A substance added to street drugs to increase the weight of the product, allowing more profit to be made, but in return, usually taking away from the drug's original potency and lowering it's side effects.
"He used too much flex. I didn't even get high."
by Nah Uh June 28, 2015
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"I get a bess flex in the party last night."

"I real flex up on him in the party."
by trini babe January 15, 2007
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