jack-in-the-socks
When a guy dumps his cum into a smelly old sock, usually after a long night of partying and drinking cheap beer.
Bro just jacked in the socks after eating pizza and watching Netflix for 10 hours straight.
My roommate does this every time he gets a new pair of socks.
He did it in the middle of the day, and I heard it from the other side of the hallway.