Depending on how recent it is it could be a Dry but flexible sock or a damp sock in your laundry basket often fapped into cause he saw his sister's titties.
When your homie shows you his cum sock under his bed he has been hiding
John:Bro look at my cum sock under my bed.
Mike: Ew WTF Bro that sock is harder then a rock.
What many teenage boys use to catch their spunk in order to avoid creating a mess with their cum. The recomennded ratio is one sock for one ejaculation but not many guys follow this as then they wouldn't have enough socks for even one day in the whole house.
"Oh bro I'm horny again. good thing I stole this sock from my sister, now I can use it as a cum sock."
A sock dedicated to being cummed into, mostly by horny teenage boys, who do this act on a regular basis.
"oh dude I'm horny again, good thing I stole this sock from my sister, now I can use it as a cum sock"
gage-imma go use my fat cum sock
kayden- ok nigger boy pass it to me after so i can shove it up my pink asshole
A mop sock is a sock or cloth that men ejaculate into while masturbating, it is usualy unwashed and not cleaned for long periods of time, and can become infested with molds and somtimes fungi.
"You're mother is a mop sock"