v. (nautical) To punish by dragging under the keel of a ship.
v. To rebuke harshly.
the GNU version of the Collaborative International Dictionary of English
verb-intransitive. 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.
The Century Dictionary and Cyclopedia
To haul under the keel of a ship.
Figuratively, to reprimand severely; haul over the coals. Also keelrake.
Word Usage
"A keelhaul drop meant sliding down a cable to the ground."