A gimpy pirate is a sexual maneuver where a man ejaculates into a woman's eyes, and then kicks her in the knee. Thus, when she is hopping around on one foot and covering one eye, it looks like a gimpy pirate
Dude, last night was hilarious, I Gimpy Pirate'd my girlfriend. She was pissed though.
You blow a load in a chick's eye, thereby blinding her and then kick her in the knee, making her stumble around the room like a Gimpy Pirate.
I gave that hooker the Gimpy Pirate and then ran away without paying!