风吹裤裆蛋蛋凉风吹裙起屁屁凉
[fēng chuī kù dāng dàn dàn liáng fēng chuī qún qĭ pì pì liáng]
In English, 'The wind blows up my pant legs, chill on the balls; wind lifts skirts, bottom chills.' It's a humorous, informal way to describe cold breezes causing discomfort by lifting clothing.