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Grown-Ass Fuck - Referring to an older person having good or even better sex as they age.

The term was popularized by celebrity Gabrielle Union on Twitter and use of the hashtag #GrownASF, after comments by Sports Media journalists of the age of her NBA star husband Dwyane Wade. Union tweeted: "Now come on home baby, I got somethin' for ya #GrownASF".
When her 30-something husband comes home, she's going to give him a Grown Ass Fuck.
by OG Design May 29, 2018
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