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 principleoutside of the bedroom..."
Singing out loud while listening to music with your headphones on. Whereas the singer gets the benefit of the music, those unfortunate to be standing nearby are subjected to an unaccompanied (and invariably crappy) rendition of the song.
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...