a peeping tom

基本解释

The guy is a peeping Tom.
那家伙是个偷窥狂。
Essentially, Rear Window is a story about a Peeping Tom.
基本上来说，《后窗》这部电影讲的是有关偷窥者的故事。
The police had received reports of a peeping Tom from several girls living in the dormitory.
警方从住在宿舍的几个女孩那里得到有关偷窥者的报告。
edu.sina.com.cn

He was of course not out on the half-scraped deck, ready to peer jokingly in the window—through which she might, in earlier days, have pretended to be alarmed at the sight of a peeping tom.
NEWYORKER: Free Radicals
While the latter enhancement merely transforms your smartphone or tablet into an extended remote, it's the former that'll turn your TV choices into a game of peeping Tom, delivering ads custom-fit for you.
ENGADGET: Yahoo! Connected TV watches with you, delivers a more personal ad experience