Interestingly enough, there's quite a few terms that are also used in Sigil.
See this article and judge for yourself:
Pirate Speak
OK, if a prisoner acts up, kill'em. If they start liking the place to much, kill'em. If they insult us, kill'em. If they kill another prisoner - \ I know, I know, kill'em... No! Try and recruit them, we can use more good men.
— Two Sodkillers