a pervert who takes the next step.
a pervert who goes too far.

a dude that trys way to hard with chicks, usually younger chicks. Also usually waits till the chicks are fucked up to take advantage of them

to be creepy or stalk someone inappropriately.

Someone who looks up girls on google to find their accounts on social media sites. They then creep their posts and find that this person has an ask.fm, they proceed to ask the girl questions they are too nervous to ask themselves. Questions like " whos your favorite black guy...."

A creep is a male that a female is not interested in. A
woman may label a man a creep if the man does not communicate
to her that he has wealth, power, or influence (such as by
the clothes he wears, the car he drives, the job title he
carries, or other external signs of social proof), and the
only thing he does show to her, his physical attractiveness,
is not enough to interest her.

Banging someone while you're taken.

To go into someone's house and to commit a burglary while they are still at home.