风吹裤衩飘风刮裤裆凉
[fēng chuī kù chà piāo fēng guā kù dāng liáng]
This name humorously describes the uncomfortable feeling of wearing too little clothing in a windy environment. Literally, it means 'underwear flaps when wind blows, it’s cold when wind enters the crotch'. It's an informal, casual phrase expressing slight embarrassment or vulnerability.