dirty tuna
When having sex and you put a dirty sock in her vagina pull it out and it is green and smells like fish.
Mike was having sex the other day with Sally and pulled a dirty tuna.
the dirty tuna
When a girl grinds on you and leaves a red mark (blood) on your leg because she's on her period.
Dude, is that blood on your leg? You just got the dirty tuna'd!!!