Definition of buttock in English:
Either of the two round fleshy parts of the human body that form the bottom.
- This time I manage to land with my entire body weight centered on my right buttock.
- He was suffering pain at the base of his buttock and also behind his knees, mainly on the right.
- Standing in an upright position, hold on to a chair for support, then extend your left leg straight behind you until you feel your buttock tighten.
Scottish informal bahookie
North American informal butt, fanny, tush, tushie, tail, duff, buns, booty, caboose, heinie, patootie, keister, tuchis, bazoo, bippy
West Indian informal batty
North American vulgar slang ass