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A motherfucker can be known in the literal sense (by that I mean someone who has fucked your mother) but the true definition of a motherfucker is the following: a bad guy/ terrorist who means to bring evil into the world or just pisses Bruce Willis off.
"Yippee-ki-yay motherfucker" - Die Hard
"Yippee-ki-yay motherfucker" - Die Hard 2
"Yippee-ki-yay motherfucker" - Die Hard With A Vengeance
"Yippee-ki-yay motherfucker" - Die Hard 4.0/ Live Free or Die Hard
by Ewan JF December 24, 2009
When you stubb your toe
" MU-th-aa FFFFuu-ccckk-errrrrrrr"
by Joey May 12, 2003
Used to denote someone with whom you may have a personal problem.
"English, motherfucker, do you speak it?" -Samuel L. Jackson
by Mike McW October 22, 2007
one of the most versatile words in the english language.
that motherfucking motherfucker stole fifteen motherfucking dollars from that motherfucker!!
by b-low July 24, 2006
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
1. Someone who has most likely never fucked a mother, or if he has, it was a coincidence.
You're such a motherfucker.

How did you know?
by philpee July 10, 2008
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