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muddafucker is sort of 'slang' for Mother Fucker, which is an insult commonly used. muddafucker is often used in texting, memes, and social media instead of having to type the long-winded 'Mother-fucker'.
U r a muddafucker - used in texting instead of "You are a mother fucker"
by FaFaFabulous May 07, 2016
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