curdled seadog

A form of an orgy in which a guy and girl have bareback sex on a boat, after which another man then has sex with the same girl causing the other man's semen to curdle.

Jim: Hey Tod whudda you say me, you and your girlfriend do a curdled seadog friday night.
Tod: Why are you always trying to have sex with my girlfriend man?

Damn bro dat bitch be a curdled seadog