Common term used in playing pool when you give your opponent a bad shot on purpose. Usually done at the end of the game when you're about to win and you don't want your opponent to catch up
Player 1: You completely missed your shot, why did you put it in the worst place possible?
Player 2: Piratepool.
Armed militiamen celebrating the occupation of an embassy by jumping into the pool there from the roof.
Or any foreign policy fiasco like that, really.
We better be careful how we leave Afghanistan, or it could turn into a total Lybian pool party over there!
When in the missionary position, before one releases in his lady he pulls out to release on her stomach and his little swimmers pool up in her belly button.