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grinfucking - the act of being (pretending to be) really nice to someone's face and then turning around and stabbing them in the back

past tense: "grinfucked"

related: "grinfucker" - one who commits such acts
Laura told me she loved my outfit, then told Mike I dressed like a whore; I can't believe she grinfucked me like that. What a grinfucker.
by ckd December 05, 2003
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I've been jabbed
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2
when you pretend to be really nice to someone and give them fake compliments
(Grinfucking) Gianna: happy birthday emily schneider! I hope you enjoy to day
(A dimwit) emily: wow that is super cool and awesome that you congratulated me on my bday!!
by gianna the boketto June 27, 2019
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