Pervert face 

A face that was supposed to be sexy, but failed and ended up a pervert face, instead. Usually people who do the face have their eyes wide, a creepy smile, and their tongue sticking out. It is a failed attempt at sultry eyes, seductive smirk, and licking their lips.

Girl doing pervert face.

Boy shudders.

Girl: Do you think I'm sexy?

Boy: No, you perverted, ugly butter face.

Pervert face by IBRockingYou September 6, 2011

face-pervert

Someone who looks through their Facebook friends and their friends' friends pictures at hot girls/guys just to stare at them.

1: Look at this girl, she's so hot.
2: Dude, you don't even know her.
1: Yeah, but... *drools*
2: You're such a face-pervert!

face-pervert by DPX January 5, 2009

facebook pervert 

A man who trolls facebook for attractive women to friend request. 90% of his friend list is young women he doesn't know or will never meet.

Facebook pervert is a man who adds numerous women so other men will look at his friends list and think he's a pimp.

facebook pervert by donna belle December 4, 2013

straight-faced pervert 

Someone who is able to do perverted things while keeping a straight face.

Him: Do you wanna use the BDSM kit and the dildo tonight?
Her: w-what? Don't say such perverted things with a straight face!
Him: What do you mean?
Her: You're acting like such a Straight-faced Pervert!

straight-faced pervert by Weeabob November 28, 2016