A person who studies the contents of other people's shopping carts. They can be found perusing the aisles of your neighborhoodgrocery store or waiting behind you in line at the checkout lane.
The cart snooper quickly looked away after he was caught red handed studying the contents of the woman's shopping cart at the local grocery store. Little did he know, he was being cart snooped by another person all this time.
A Snooper is someone who digs through things that they shouldn't, aren't theirs and they have *NO BUSINESS* with and who then gets all bent out of shape over what they find.
My X looked through my phone and just started deleting phone numbers. Fucking hate Snoopers.
He got back together with his X. After she was moved back into his house, she turned Snooper and read his e-mail over the 6 months they weren't dating/talking/hated-each-other.
She went Snooper on his Facebook to find the girl he'd been fucking, or maybe just knows, or could even be related to. She couldn't tell from Facebook but she was *PISSED* anyway.