To steal or take something that does not belong to you.

1. vt. (Am. slang) To steal in a surreptitious or underhanded manner
2. vt. (O.L. slang) To gang up on and frag an opponent in an MPG
3. vt. (Am. H-Hop)Character assassination

When a group of people kill a single opponent in an MMORPG. Taken to abreviate a "gang kill".

verb (Online, MMORPG usage)
1. To kill another player using a group of players
2. To kill another player using any means that places the played to be killed at a substantial disadvantage.

Widely popularised following the success of World of Warcraft, the word "gank" comes from "gang kill", used in earlier MMORPGs like Ultima Online. A gang kill occurs when a group (or gang) of players attack a single one and kill him/her with relative ease.

The meaning has now extended to any player kill where the killed player had little chance to avoid death.

To take something for free, either with or without someone's permission.

1) To filch (presumably a portmanteau of "grab" and "yank").

2) To playerkill in an MMORPG.

3) To insult or slander.

(v) To Gank: The artistic stealing of an urban person's works. These arts incluse rap music lyrics, spray painted symbols on urban exteriors, and hoes. But primarily spray painted symbols.