U凸内裤 yōutūnèikù contour pouch briefs Origin Definitions Defs Strokes Stroke Words Sentences Sents U yōu non-Chinese 凸 tū verb protruding to stick out or protrude; convex; describes a male connector. This is the opposite of 凹 āo.内裤 內褲 nèikù noun underwear underpants; briefs; panties; knickers