Similar to the fish eye, the filthy pirate is when one is having sex, and just before climax, the man pulls out and comes in his partner's eye. Usually, the partner covers her eye with one hand, and the man says, "Arr."
Guy: I gave that girl the filthy pirate last night.
Another Guy: Arr.
synonym for filthy pirate.
I came in my girlfriend's eye last night. I gave her the old "Pirate Eye."