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When in awe of an incredibly awesome human being they are referred to as a Sick Mother Fucker.
A person is often referred to as a Sick Mother Fucker after doing or saying someting outrageous.
Person A: Hey that guy just saved a baby from a burning building while drinking a beer and having sex with a nun.
Person B: Ya, cuz he is a Sick Mother Fucker!
by vanessa1989 November 25, 2009
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