One who fucks his or her own mother. However, in recent times, it has adapted to:

1.) One who fucks any mother (which means your father/mother's girlfriend is a motherfucker).

2.) An adaptable insult for anyone whom you'd like to offend.
1.) "Johnny, you're such an incestuous pig, you motherfucker!"

2.) "Your father is such a motherfucker."

3.) "Billy, you haven't showered AGAIN, you motherfucker?!"
by iNFAMOUS RiCK March 12, 2005
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(adj) Used to tone up and strengthen what you mean like making something heavier,worse,better,more incredible...etc
-I can't bear with my motherfucking brother! He broke down my baby(computer) again!

-Most people are gonna have their motherfucking lessons when they face to the God

-A:Can you help me with carrying the caryall?It is really motherfucking!
B:Let's haul the ass then!

-Do you want me to give a fuck to your motherfucking ideas? Am I that motherfucking that your mama think?
by Da Sigma [ARG] March 14, 2009
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Pretty much meaningless insult. Used by alot of people but doesn;t really have any impact anymore since it's used so much.
use your imagination people you can pretty much put it in any sentence.
by rotten ralph July 27, 2004
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Can also mean a musician of great skill. Often coupled with "bad" as in "bad motherfucker". Can be an extreme compliment in certain circumstances.
Man, Prince is a motherfucker on that (guitar/bass/keyboard/piano/drumkit)
by jedilaw March 26, 2003
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Someone who would sell out even his own mother to get ahead.
I can't believe he would say that about his mom he is a motherfucker!
by FM Punk October 18, 2018
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You're father.
Son: Hey motherfucker, how was mom during my conception?
by SomeRetard101 November 28, 2020
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This term was originally used during slavery or by slaves. The salve master would come to the slave "house" and take liberties with the female slaves. Though the term was not usually said to the "masters" face, if it was said that the motherfucker was coming it was known what was meant.

(The term applied to slave masters or anyone that had authority over the slaves. Slave Masters, Their Sons and overseers).
Here comes the motherfucker again. The motherfucker came last night.
by Muquit January 9, 2012
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