What is Buttocks?

Buttocks definition and meaning on Dictionary terms:
Usually buttocks. (in humans) either of the two fleshy protuberances forming the lower and back part of the trunk. (in animals) the rump.

Sometimes buttocks. Nautical. the aftermost portion of a hull above the water line and in front of the rudder, merging with the run below the water line.


reference: https://www.dictionary.com/browse/buttocks