Internet Creep 

One who is incapable of chatting up girls in real life and therefore resorts to stalking them online.

So let's say this kid stumbles across a girl's youtube account where she posts occasional vlogs - he finds her physically attractive. He will then google (and perhaps even yahoo) her username and see if she's signed up to any other sites with that same name. Let's say he finds something (Friendster, myspace), he will then try find any information about her he can. This could include where she lives, her age, interests, whatever. If there are any pictures of her on one of these sites he might even save them to his computer (provided the given site allows it). Then when he's gathered what he believes to be enough information, he'll contact her somehow and surprise her by pretending that his interests or whatever are congruent with hers. Say she's from Philadelphia - he'll put on some bullshit about how his Grandparents grew up there. And so on and so forth - that is an internet creep.

Internet Creep by iamwhatiamcalled October 21, 2007

internet creeper 

Someone who sits online all day and stalks people aim, myspace, and etc. Often making fake profile to throw off their identity.

George the internet creeper made another fake myspace to mess with people.

internet creeper by Kipanie May 25, 2009

Internet Creeper 

Typically a man (but let's not generalize) who sits on his computer (probably in a family members basement-apartment which he refers to as his lair) and frequents social networking sites for the sole purpose of creeping innocent internet browsers. Chatroulette is the #1 virtual gathering ground for internet creepers.

Imagine a boring night at home. You log onto chatroulette for shits and giggles and what do you see? Penis aka Internet Creeper.

Internet Creeper by Willow Dreams June 7, 2011

Creepy Internet Stalker 

A furry/anime artist/other talentless, oversensitive type who gets mad at a particular person (usually a female that they have a creepy, backwards crush on) and goes around trying to get even in such ridiculous fashions as writing innacurate, stupid definitions including their real name.

I seem to have a creepy internet stalker on urbandictionary.com

Creepy Internet Stalker by tengu shoes January 7, 2005