屁股

屁股	pì gu	buttocks / bottom / butt / back part
屁	pì	fart / flatulence / nonsense / (usu. in the negative) what / (not) a damn thing
股	gǔ	thigh / part of a whole; portion of a sum / (stock) share / strand of a thread / low-level administrative unit, translated as "section" or "department" etc, ranked below 科 / classifier for long winding things like ropes, rivers etc / classifier for smoke, smells etc: thread, puff, whiff / classifier for bands of people, gangs etc / classifier for sudden forceful actions