The circumstance in which your penis Is wacked around until it starts peeling. Usually an activity initiated by a couple, or more commonly done by homies.
Bro 1: dude my foreskin fell of by the time I went to bed last night.
Bro 2: the slap'n'flap I gave you left my hands calloused.
Bro 2: the slap'n'flap I gave you left my hands calloused.
by Mypenisisthrobbing August 7, 2022
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