When the regular motherfucker just doesn't cut it; a higher level of motherfucker.
It's going down now, you grand motherfucker!
by The Great Dark February 8, 2015
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A respected older motherfucker who has been promoted by excelling as a motherfucker or by fucking one or more grandmothers
John is now a Grand motherfucker.
by JAKINTEXES May 22, 2011
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