股沟

股沟	gǔ gōu	buttock cleavage / butt crack
股	gǔ	thigh / part of a whole; portion of a sum / (finance) 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
沟	gōu	ditch / gutter / groove / gully / ravine / CL:道