The act of sitting on someones face butt naked with your ass on there mouth and your nuts being separated by the other persons nose, which resembles sitting on a bicycle seat.
But you must pedal with your feet and hold your arms out as if you are actually riding a bicycle.
Dude the other day i was going in for the t-bag and i slipped and full on bicycle sheeted on there face. my nuts were all like spread eagle.
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