a person who is highly effective in accomplishing tasks, assignments, doing the bosses dirty work, etc. plain and simple the motherfucker is The person who gets things done !
having completed a sensitive task the manager said to Jeffrey, "Jeffrey you are The Mother fucker!"
by Zloyobar August 24, 2008
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A term used to insult someone who is annoying
goofydave is a mother fucker. he never listens when i tell him stuff
by David November 17, 2003
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When you talk to your sister's boyfriend, or just your dad, or even you!!!!
by Ben van blaricum April 10, 2004
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Often substituted for the word Bitch. Someone who fucks there mother is most likely a very sick person, so the word is usually used to describe someone who makes you sick.
"That Mother Fucker at the salon fucked my hair up"
"That is one crazy Mother Fucka"
by Whitney08 October 10, 2007
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1.a person who has sexual intercourse with their/a mother.
2.An insult to describe friends.
3.You
1.You are the #1 motherfucker. You got your mom and your friends' mom pregnant 5 times.
2.Rob is such a motherfucker
3.You motherfucker!!!!
by MoFoe August 24, 2003
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Also pronounced as "muddafucka" usually spelled motherfucker.

Old black slave term for when the shit heel overseers were encouraged to breed with the field nigras in order to create a (a slightly) less smelly house negro.

Usually the most lowly of hired hands was designated for such a demeaning task.
Quimbo: That ol ned sho beez a muddafucka (mother-fucker) hee hee! He say he want his self a high yella of his own, cuz they is natural bown dicksuckers!

he may gib us a less smelly sister, or he it may be one dem hos that looks like de albino gorilla.

Ruffus: Yea they sho nuff iz. He gots mama behind de shed now. It only cost him a chicken and some watermelon rinds. Bend over de table doody booty! hee hee!

Ned: What the fuck are you laughing about nigger? I'm your mother-fucking-ing daddy too!
by kathaksung April 20, 2008
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