What is Keelhaul?
1.
Keelhauling was a form of punishment for sailors at sea. The sailor was tied to a rope looped beneath the vessel, thrown overboard, and then dragged under the keel and up the other side.
Keelhauling was generally a death sentence since it could take as long as three minutes, and perhaps longer, to walk the ropes all the way back to the stern. Often the ropes caught and dragged on barnacles on the ship's hull: the barnacles ripped the victim's clothing and skin to shreds as he was dragged along.
Dont fuck with me, I'll keelhaul youra ss
2.
The unsavory practice of surprising a sleeping partner by running the full length of a sweaty grundle across their nose/face.
After a five hour bike ride, Neil couldn't wait to get home, get out of his spandex, and keelhaul his girlfriend.
