Also, an insult for an individual perceived as being as worthless as a jizzed-on sock.
That hack comedian stole his whole act from Richard Pryor and Comic View. What a Jizz Sock!
Out of the womb of the wet blanket came the term "jizz sock". A jizz sock is a slutty wet blanket! When you're jerking off, you just grab any old jizz sock off the floor and then throw it in the laundry bin. No one likes a jizz sock once it's been used.
Kelly: Yes I do!
Jennie: Well, I thought about slutty wet blankets... why don't we call them jizz socks?
Kelly:... That... That needs to be put on urban dictionary!!! 'Yea she's a fucking jizz sock... just some shit that was lyin' around on the floor' It's PERFECT.