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Tightness of your ass. Can be used when playing a game and either you are winning or losing.
I was butt clinching my ass while playing this game.
by eaudetoilet January 02, 2017
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2
a man squeezing their glutes together during oral sex to make it last longer.
The adult actor was butt clinching to last the whole hour.
by Coop Dupe June 09, 2018
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