Keelhaul v. i. : To haul under the keel of a ship, by ropes attached to the yardarms on each side. It was formerly practiced as a punishment in the Dutch and English navies.

Example:
What can you tell me about Operation Keelhaul?

Taxonomy
keelhauling, punishment, pirate, song, sailor, free encyclopedia, Keel Haul, corporal punishment, captains, seaman, crew, jokingly, second album, Black Dog, Episode 9, Dutch, barnacles, Pirate Metal.

Defination from the web:
... pirate rap band Captain Dan & the Scurvy Crew have a song entitled "Keel Haul 'Em" which appears their second album Rimes of the Hip-Hop Mariners. ... Mal responds "Well I hear tell they used to keelhaul traitors back in the day. I don't have a keel to haul you on, so...