1 definition by Sweetness7

Top Definition
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.
by Sweetness7 August 26, 2009

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