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1.
(video games) So cheap it should be considered cheating. Typically describes a technique in a fighting game that instantly or flawlessly defeats the opponent, or a move that has no flaws and deals insane damage.
Derived from Super Smash Brothers (N64), whose fighter "Link" has the most powerful arsenal of extremely cheap attacks ever seen in a fighting game.
Originally coined by R. Sosa ("Twinkin' Out With Red Mage")
Way to hit me with the most cheatery move in the game, Link!
by GrifMoNeY February 03, 2004
 
2.
a gratuitous piece of blatent cheating whereby the cheater knows he's doing it and is proud of the fact that its that blatent, that he carries on doing it regardless
Look at that exhibition of abject cheatery. I can't believe he thinks he's getting away with that.
by P. Jay Edgeways January 30, 2008
 
3.
the word originates from the rosella and ben inc company. it basically means to cheat something or be cheated we just jazzed the word up geddit!
'cockroaches are such cheatery'

'omfg they over charged me. cheatery!!'
by rosella August 12, 2004