a dirty pirate is when a girl is giving a guy head and he busts a sharp load in her eye and kicks her in the kneecap leaving her hopping around one one leg, with one eye open, screaming ARRRRRRRRRRRRRRR!
Guy 1: so this girl was suckin me up last night and she bit my shit.
It's the longer version of the dirty sanchez. When you are done having anal sex with a women, you proceed to wipe your penis across her upper lip giving her a rich and full mustache. Then you come in her eye giving her a sort of liquid patch. Now for the final step you kick her in the shin so she jumps around like a pirate with a peg leg.
When a girl is giving you head, you bust all over her jaw...rip out your pubes and throw it on her face so she has a beard, and then kick her in the shin so she limps and says "ARRRRRRRRRRRRRR" like a pirate. That'll get her wanting more.
When a girl is givng you head, you spit on her back so she goes "huh, already?" and turns around looking at you. As soon as she does, you shoot her in the eye, kick her in the shins as hard as you can. She then hops around covering her eye with her hand and holding her leg and yelling "arg!"
(me:) "Dude! Last night I gave Chuck Cosuins girlfriend (Jill) a dirty pirate! It was so funny, she was hopping around like a peg-legged pirate yelling arg!"