When your special someone is giving you oral sex you ejaculate on her chin and you trim your pubic hair, then you sprinkle your hair on her chin making it look like she has a beard then tell her to stand up, next you kick her least favorite leg and poke her eye. So she is a one legged pirate.
Dude 1: I pulled a fast one on my girl yesterday.
Dude 2: No way really the One Legged Pirate.!
Dude 1: Yeah she looked like Captn Ahab.