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1.
a cheat used in a computer/video game that takes advantage of a wall in some way:
1.)player characters can be seen through the wall
2.)player characters can walk up/through walls

etc.
Jimmy used a wall hack to find his opponent in Counter-Strike.
by KarmaGhost April 19, 2004
 
2.
A cheat for FPS games (most often seen in Counter Strike that makes walls and solid objects more or less transparent, so it is possible to obtain knowledge of the whereabouts of other players.
Used by thirteen year olds and people who are unable to do good in a game without unfair advantages
OMG, you fucking hacker, turn of your wallhack, n00b.
by bad mongo July 30, 2003
 
3.
A type of hack used in computer games such as Counter-Strike to exploit the terrain of the arena. Wallhacks come in many forms, but they all are pieces of programming designed to give an unfair advantage to the user, usually a teenage script kiddie. Among known varieties of wallhack are "Ghostmode" (the ability to walk through walls), "Railgunning" (the ability to shoot through walls), "Glassworld" (the ability to see through walls), and many more. Because of the nature of online gaming, it is highly likely that wallhacks will continue to flourish, as for each one found and destroyed, another variation is created.
When POProdigalSon turned on his wallhack, he got an easy kill on DragonLord by shooting him through a hill.
by LibrarianBrent October 20, 2004
 
4.
To use hacks (aka h4x) to do any of the following in online games:
1. See through walls.
2. Go through or climb walls
3. Shoot through walls
4. Capture flags or other objectives through walls
Those ghey h4x0rs wallhacked by the hostages in Counter-Strike and stole the flag through the floor in Halo
by PeaTearGriffin March 06, 2005
 
5.
A cheat in FPS video games that enables you to be able to see you enemy and other objects through the walls.
Wallhacks will most likely will get you banned from PunkBuster or VAC.
CS:S Player: "Wow he prefired me he probably has wallhacks."

CS Player: "He's been playing only 2 days and is better than me, he must be wallhacking!!!"
by WoF | DejaVu August 09, 2008
 
6.
Something that accomplishes a goal through nontraditional means, or a nontraditional solution to a problem.

A reference to wall hacks, a term in video gaming in which walls are able to be shot or peered through to gain an advantage against an enemy.
Person A: I just got that girl's number by hitting on her friend!
Person B: That must've taken some serious wall hacks!
by TonyThe Source May 14, 2011
 
7.
Script used to make little 12 year olds who only use their computers for gaming cry.
myg0tj0n used his l33t wall hacks to rage the public CS:S server.
by t00 l33t March 27, 2005