creeper

(noun) (slang) a person who makes people uncomfortable at parties, bars, nightclubs or social situations

Example Sentences:

A: Look at that guy over there.
B: What guy?
A: He keeps staring at me and smiling, but he won’t come over and say hi.
B: Oh god, what a creeper.

Annie asked the creeper to leave her party, because he was making the women uncomfortable.

From the Blogs:

Creeper men We all know them and here’s some funny ones!

Media:

Similar idioms:

1. sausage party