A euphemism for something a male may fuck and then blow (ejaculate) into for example a sex toy, cup or pillow case..

Using a sock as a fake condom to come into. The opposite of a posh wank (which actually uses a condom).

Function: noun; vulgar; Method: The act of fellating (performing a blowjob on) a distended or inside-out rectum (commonly referred to as a pink sock or a red sock).