While fucking a skank in the ass, you strike a solid turd plug. Upon discovering this buried treasure deep in her booty, you scream, "ARRRRGHHH!", like a pirate.
Last night sucked, man. I was ass-fucking your sister and hit Pirate's Treasure. That girl needs to eat more greens.
Occurs during a game of billiards, in which your opponent(s) accidentally hits the cue (white) ball into a pocket. You then proclaim the term "Pirate's Scratch." If delivered repetitively with the proper tone and dialect, your opponent will become extremely aggrivated. The need to know exactly what a "Pirate's Scratch" is will become overwhelming. At this point, you must make a habit of putting the word "Pirate" in front of every pool term. Oh yeah, it doesn't mean anything.
"I'm gonna combo the one to nine in the corner..."