1 definition by Keep calm

1

when your penis comes all the way out while having hard sex and misses on the way back in.

George: "Dude, I got a willy bang last night when my dick shifted while fuckin Jullie wicked hard. Seriuosly, nearly broke my cock."

by Keep calm December 07, 2011

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• © 1999-2021 Urban Dictionary ® • advertise • terms of service • privacy • dmca • bug report • help • blog • data subject request