An act where a male masturbates to into a sock until ejaculation. Said sock is then turned inside out so that the ejaculate is now exposed. The masturbator then takes the dirtied sock and slaps an unsuspecting victim in the face with it. Shame, humiliation, and hilarity come with being soaked with rocket sauce.
Bill was being kind of a dick to Jerry, so Jerry decided to give Bill the ol' Auburn sweat sock.