The part at the back of the hip, which, in man, forms one of the rounded protuberances on which he sits; the rump.
The convexity of a ship behind, under the stern.
buttock in Dutch is bil
buttock in French is fesses, fesse
buttock in German is Hinterbacke
buttock in Italian is natica
buttock in Norwegian is rumpeballe
buttock in Spanish is nalga, posaderas
buttock in Swedish is skinka