The abbreviation "pker" stands for "player killer" and is most commonly used in online games where players fight one another head-to-head, such as Diablo and Runescape.

Symptom:
A PKer is someone who hunts less experianced players on internet videogames. PKer's are considered the murderers in the RPG universe. Usually, a PKer will target someone who is grossly lower in level then they are, if it is an RPG that is. PKers have zero remorse for who they kill, and will eliminate one or more of the same players over and over again. In the popular game, Diablo 2, PKers run rampant in hardcore. There are a few in softcore, but not as many.PKers will get more "pleasure" from killing in HC, due to how once their victim is dead; It stays dead for good. Because of this lovable trait, PKers are rarer in softcore, but still should be looked out for! Pkers will use hacks from time to time to improve their "kill rate". Lagging the game, etc.

Cure:

Usually a PKer is focused on killing weaker people then him, so it's fairly easy to dispose of one with the conventional means.(i.e killing him.)
Pkers will usually, if alone, leave the game if they are outnumbered, or see that they will lose the fight. Pkers who are also skilled fighters are difficult to find- but still exist nonetheless.

The person who makes tierlists for the popular roblox JoJo game called "YBA" (Your Bizarre Adventure)

A fan of the Italian Disney sci-fi comic saga "PKNA - Paperinik New Adventures".

One who goes for unexperienced players, players that are lower levels than him, or people that are weaker than him, in both spells and attacks.

09 Pker: Catastrophic failures that have the e-balls to call themselves "pk'ers," but rely on the amount of brews their pokemon can hold, and act e-tough because they sit on the computer long enough to spam click something 50,000 times a second.

Ancient pkers is one of the best pking clans in runescape, they owned the wild, and now they own bh.

A limpdick cocksucker who ventures into PvP in RuneScape who falsely label themselves as good because they spend countless hours asking friends for bots, and countless hours using them, just to get some gay-looking sword. This generation of inbreds is the worst to plague RuneScape, one mother's credit card at a time!

In runescape heat pker is one of the world's best pkers. Zezima tried to add him, but heat pker ingored him.