Top Definition
SethHack is a popular "Cheat" for a Half-Life 2 modification known as Garry's Mod. The cheat consists of multiple settings such as aimbot, esp, chams, etc. It was written by some British kid named 'Seth (He is only 12 surprisingly!).
Dude, did you just use SethHack to aimbot me? You cheater!
by c_to_the_unit October 02, 2011
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