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1.
It seems to be that the term 'stalker' no longer means what it used to mean--the pathological ANONYMOUS follower and tab-keeper of another person or persons (A detective who has not been hired and has no real reason to follow someone). The old definition also would say that a 'stalker' often has an imaginary connection with the stalkee.

HOWEVER, common usage of the term, along with the term 'creepy', has come to be used as a defense mechanism for anyone seeking justification for not being attracted socially or physically to someone else.

This term is nearly as overdiagnosed as ADHD is in children. Any women who think an undesirable man might be interested in her will almost always automatically label him a stalker.

Note: Far too many idiots think they're more important than they really are. Real stalkers seek out beautiful, interesting, and often famous members of the attractive gender. 90 percent of the people who use the term couldn't get a real stalker to save their lives.
A hot girl who follows you around and shows up at your door is a friend.

An ugly girl who follows you around and shows up at your door is now, according to most, a stalker.

A hot guy who gives you flowers is a romantic.

An ugly guy who gives you flowers is a stalker.
by Colin Robertson November 12, 2005
 
2.
a person obsessed with another to the point of insanity. I.E. following one everywhere, calling constantly, not following restraining orders, collecting their hair in shower drains
he is stalking you.
by Anonymous June 02, 2003
 
3.
Someone who:
1. Literally follows a person's every move, on Facebook or otherwise.
2. Is way too obsessed with someone to the point of being a creeper.
Iris: At 19:30 EST, she was chilling on the Upper East Side.

Madeleine: Oh my God, you stalker!! BTW, did you know she made $130,000 last year? I bet she was laughing all the way to the bank!

Iris: Who's the stalker now? And yes, actually she was. I saw her.
by ____spt5.3 September 27, 2009
 
4.
Edward Cullen
The word "stalker" is just a synonym for "Edward Cullen"
by FreddythePhisher December 09, 2009
 
5.
I did not know what a STALKER is until I become one. A stalker can sit in a car nearby a persons house for hours straight. A STALKER poisons the victim's WLAN ARP table and sneaks into the person's Facebook account and takes notes about the persons friends and comments. A STALKER observes who visit the person and feel enormous jealousy towards them. The stalkers would make quite good private detectives.

Most notorious STALKERS build a shrine for their victim and plaster the victim's photographs on the wall around the shrine. They are the REAL PSYCOPATHS. More mild cases just write definitions into URBANDICTIONARY.
Me: Oh, fuck. I became a stalker. I cannot help sneaking around her apartment.
Jake: Get over it, man. There's more fish in the water.
by C*ntLinguist November 22, 2009
 
6.
Someone that is obsessed with a person. Watching and noticing every part and piece on your body. A person that craves attention so they stalk you because they want the same attention. A person with great interest and finds everything about you remarkable yet have no idea who you are.
Bob(the stalker):Hi Kelly
Kelly: Who is this person
by Ashley Morrison December 12, 2003
 
7.
A person who live in the "zone", the area around Chernobyl after its second meltdown. They are illegally there and are bound to no laws. they kill who they want and then suffer the consensuses of that choice. Many are there to get rich off the artifacts and anomalies that where created by the blowouts of the power plant. Others are criminals that have fled there to escape from the law. The Ukrainian and Russian military's are constantly trying to eradicate the S.T.A.L.K.E.R.s but usually have no luck, there are just to many of them and they are under manned.
NOTE- videogame
Pavel- Dude, that guy over there is a S.T.A.L.E.R. he just came out of the zone.
Yakov- I wish I was a S.T.A.L.K.E.R..
by YakovAlekseev February 10, 2008