Creeperdar 

It's the opposite of gaydar. It's the ability to detect a creeper/creepy/perverted person from a close proximity, or maybe even a farther distance.

My creeperdar is going off hardcore, for that old man is offering the little girl candy.

Creeperdar by SophieSophie July 20, 2009

Creepertarian 

A libertarian, most likely male, who believes the opposite gender's love for liberty is the green light to make a pass. Unfortunately, the creepertarian does not receive signals of rejection, and drives the victim away from the liberty movement entirely.

Creepertarian: "So I heard you're in to liberty."
Girl: "Yeah! I love the Liberty Movement!"
Creepertarian: "Me too! Except I only adhere to the non-aggression principle outside of the bedroom..."

Creepertarian by shinrin785 July 28, 2012

Creepersaurus rex 

A person who is beyond creepy, like a creepy dinosaur (such as a T-rex). They are very strange, weird, bizarre, uncomfortable, and are usually very much unaware of it. A Creepersaurus rex will exhibit inappropriate behavior, such as stalking, demonstrating mental breakdowns on social media, or worse.

Teacher: This former student of ours posted pictures of my colleague on her Facebook cover photos without his knowing and she totally came off as a Creepersaurus rex. Stay clear of her.
Colleague: Omg... Yikes! The zoomed in photo sure didn't make it any less creepy, huh...

Creepersaurus rex by LingDanc803 April 21, 2021

creeperazzi 

Someone who takes creeper photos of other people without their permission. Photos may or may not show up on Facebook.

That guy is such a creeperazzi, he's been taking photos of me all night.

creeperazzi by Leelli January 18, 2009

creeperbating

The act of masturbating; however, the masturbation must be under circumstances/intentions that would define one as a "creeper".

He was totally creeperbating.

creeperbating by KeenlyACreeper July 23, 2011

Creeperatism 

pronounced (Bren-tus), is defined as the act or acts of being creepy. Examples include but are not limited to knowing everything about a person or persons by searching Facebook, Twitter, or other online social networks, and posting on conversations that do not necessarily pertain to said individual.

I knew he was a creeper but I did not understand the full extent of his "creeperatism".

Creeperatism by BigDaddyBigMak April 24, 2011

Creepdar 

Much like Gaydar, it is one's ability to sense that the person you have currently are engaging in conversation is a creeper.

I walked into the store, and the Mouthbreathing neckbeard who greeted me immediately set off my Creepdar.

Creepdar by CarolynCosplay August 2, 2011