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1.
When a hater or would be hater pictures, pretends, or imagines themselves hating or comiting hatered toward another person, in their mind, personal thoughts, or meaningless actions.
Eric-
"John is a douche. He told me he hates the Beastie Boys and named his old Hulk Hogan wrestling buddy Ad Rock. And he fights it."

Tom-
"Wow, sounds like John has been HALLUCINAHATING."
by Number2wo_2 February 13, 2012