Some Other Cunt's Kid
The annoyance of some other male having impregnated a female with his spawn and causing down-stream problems for other guys. Problem being she'll suck your for cash and may have a child to the new guy.
"Jesus dude! Stay away from her, she has a SOCK!"
"A fuckin' SOCK! Some Other Cunt's Kid!"
Oh, shit. Give that one a miss..."