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When a man inserts his middle finger into a girls asshole and his thumb into her vagina and attempts to make a snapping motion with both fingers.

Last night I gave Angela the Snapper I couldn't hear it though.
by Piyonugget November 17, 2007
Sex move used when a man fully inserts his penis in the twat/anal from behind, the person penetrated swings his/her ass violently to the side which results in "snapping" the penis of the penetrator in half.
Henry decided to be gay and booty-bang Josh while he's asleep, but Josh pulled off the snapper and "snapped" Henry's small dick.
by SnakeBiter October 07, 2009