1. 内裤
Pants are a piece of underwear which have two holes to put your legs through and elastic around the top to hold them up round your waist or hips.
e.g. I put on my bra and pants.
我戴上乳罩,穿上内裤。
1. wear the pants : 掌权当家;
2. with one's pants down : 处于尴尬境地;