peep over (something)
1. To glance or peer shyly, quickly, or inconspicuously over the top of something. We peeped over the fence when we heard the neighbors start fighting. I caught the child peeping over the top of the sofa to see what was going on.
2. To be revealed partially above the top of something. All I could see was the man's head peeping over the top of the wall. Your underpants are peeping over the top of your jeans, Tom.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
peep over something
to raise up and sneak a glance over some barrier; to look over the top of something. The child peeped over the wall to get a look at the yard next door. Grandfather peeped over his glasses to look at the television set for a moment.
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.