down trousers

基本解释

Thief:So? William:So, I saw you put that book down your trousers.
小偷：怎样？威廉：因此，我看到你把那本书放在你裤子里。
They stuffed it down trousers, into handbags and, when other pockets were full, into socks.
他们把钱塞进裤子口袋、放进手提袋，甚至当其他口袋塞满后，将钱塞进袜子里。
A timeless look: bedroom slippers, orange pinstripes, tangerine belt, string round your neck, hand down your trousers.
永不过时的穿着：拖鞋，橙色竖纹的衬衫，亮橘色皮带，脖子里的皮绳，手搁在裤子周围。

It was you who slid your hand down down inside my trousers .
NEWYORKER: Silence, Exile, Punning
The agricultural divisions of two big trading firms, Glencore and Noble Group, were caught with their trousers down and lost money.
ECONOMIST: Cotton exports
PayPal changed its mind not because it respects free speech but because it got caught with its ethical trousers down and enough people cared about it to protest.
FORBES: PayPal Forced Into Erotica U-Turn