One who attempts to hijack a game by creating seemingly canon information for it without consent from the author of said game.
Followers of Jadusable's ARG mostly see MHFTT on YouTube as a gamejacker.
by Lady Alzers June 19, 2011
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A website that pretends to be associated with an online ARG (alternate reality game), but is generally spam. These fake websites cause confusion, promote mis-information, and ultimately waste the time of everyone involved.
That website is not related to the ARG, it is a Gamejack.
by Chibbie August 16, 2007
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