pants
/pænts; pænts/ n[pl]
1
(a) (Brit) men's underpants; women's or children's knickers （贴身的）裤衩（男用的、 女用的或儿童用的）
a clean pair of pants 一条乾净的短内裤.
(b) (esp US) trousers 长裤; 裤子.
2 (idm 习语) bore, scare, etc the `pants off sb (infml 口) bore, scare sb extremely 使某人厌烦透顶、 吓得要死等. by the seat of one's pants => seat1. catch sb with his pants/trousers down => catch1. have ants in one's pants => ant. in long/short pants (US) grown-up/not grown-up 成年[未成年]
I've known him since he was in short pants. 我从他小时候就认识他. wear the pants/trousers => wear2.