A creepy person who watches you, lurks your myspace/facebook, and is rather queer-looking. He is usually the person to follow you home, or to urinate right beside you when the other urinals are available; someone you dont want around, unless you are a creeper.
"Hey, yesterday I was followed by a creeper."
"Yeah, and he molested my sanity."
"Shit, son! Let's fuck him up!"
A person who not nesessarily stalks other people, but gives you the creeps and might do awkward things. This person does not have to be a stranger either. You can know them well, but is not someone you want to associate with.
Girl One: Wow, Leon is such a creeper. He's sitting all by himself in the loner seat at the movies.
Girl Two: Yeah, what kind of person sees Reno 911 by themselves, anyway? What a creeper.