It's an abbreviation for "Mother Fucker".
Guy - I fucked your mom.
Dude - You sick Mo-Fo!
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an abbreviation of "Mother Fucker". it is used for slang.
YOU MO FO!!!!
(you mother fucker)
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short for mother Fucker- (a place)
someone is gonna get hurt up in this mo fo
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If you are a mo fo you are a mother fucker!!!!!
"You mo fo" says the boy "fuck you" you reply
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