Top Definition
An ethical moral value system which simply states: "mentally fuck with anyone as much as you can".
Fuckmentalism is best described by a few examples. What follows are two sample conversation between a fuckmentalist and a normal person:

Normal: "you know, you ask too many questions."
Fuckmentalist: "yes, this is true. But I ask a lot of answers too."
Normal: "WTF"

Normal: "You can either be gay... or bi"
Fuckmentalist: ".. or both."
Normal: "WTF"
by TallTruther February 21, 2009
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