A fork of Rural Dictionary
When your hair is long enough that looking up and down rubs your hair against your butt.
We thought she nodded her head yes, but she was really butt flossing.
The stuff left over in your cum sock after you use it.
Girl: I'm cold.
Guy: Go grab some socks.
Girl: Ew! What's in this one?
Guy: Oh those are cum crumbs, that's my cum sock.