look up any word, like ratchet:
 
70.
A term used to refer to a pal or chum of yours.
I invited that motherfucker over to mah crib and we got piss drunk like a couple o' drunk motherfuckers.
by redelixir March 15, 2003
 
1.
My father
My father is a mother fucker, that's how I was born
by Anonymous July 11, 2003
 
2.
A common slang derived most popularly from a form of "yo momma jokes" but actually dating waaaay the hell back to the 1300's when it was considered the highest sin to sleep with ones own mother. (Even above murder.)

It can mean precisely as it sounds, one who has sex mothers, but it was originally meant as "one who has sex with their own mother".

It is most of the time used without meaning, just to be said in a sentence, it can mean absolutely nothing and absolutely everything its meant to at the same time.

Also is used constantly to denote someone is a moron, a trife, a back stabber, and any number of other completely unrelated meanings.
"You motherfucker! how could you!"
"What the motherfuck is going on here?"
"Motherfucker, motherfucker, motherfucker...!"
by andrew October 27, 2002
 
3.
Is a noun that can represent any person place or thing.
1. That mother fucker owes me money.
2. Your party sux. This moter fucker is boring.
3. Im hungry as a mother fucker.
4. When i hit you, that mother fucker is gonna hurt.
5. Im broke like a mother fucker.
by Anonymous March 29, 2003
 
4.
word that really has no meaning, because it can be used as a compliment just as easily as i can be used as as an insult. probably the most widely used curse in the english language
you are a mother fucker (insult)
you are one bad mother fucker (compliment)
man, i'm high as a muther fucker (??)
look at this mother fucker right here. (??)
by brent April 10, 2004
 
5.
is a (1)PERSON, (2)PLACE, (3)THING, or (4)EVENT.
(1) "That MOTHERFUCKER owes me fifty dollars"
(2) "Let's get outta this MOTHERFUCKER"
(3) "Where'd that MOTHERFUCKIN' thing go!!??"
(4) "This MOTHERFUCKER is wack, let's get the fuck out!"
by JEENO October 17, 2003
 
6.
Motherfucker (also contracted forms mother and mofo and, phonetically, in African-American vernacular speech, muthafucka) is a common insult and profanity in the English language and is widely considered obscene and inappropriate. By virtue of its history of usage, motherfucker generally is regarded as African-American in origin. Literally, it accuses one of violating, perhaps, the oldest taboo known to humankind, incest. However, as with most epithets, its use is pejorative, rather than literal. Historically, it was a vicious taunt, a damning insult -- and a veiled allusion to the destruction of black male familial hegemony under chattel slavery. The power of the word was that it attacked one's sense of manhood. Regardless of its historical or cultural context, however, many consider motherfucker the mother of all curse words. The cause of countless barroom brawls and streetfights, it is purported to have sparked at least one prison riot.

Motherfucker has taken on additional meanings through continued use, its evolution being shaped primarily by, again, the African-American community. It has come to mean a formidable or inexorable force, as in the threat: "Payback is a bitch, but revenge is a muthafucka." It is also an expression of disgust or contempt: "Now, ain't that a muthafucka!" Motherfucker also has come to be used in some circles as a general pronoun.

The initials M.F. became a common, more polite substitute for motherfucker, as did the term Maryland farmer in the 1960s and 1970s. The result is an oft-recounted, if somewhat apocryphal, tale of the clueless Maryland Farmers Association writing a letter of protest to a prominent African-American in the news. It seems he called a Capitol Hill politician a "jive Maryland farmer," and the association's members were mightily offended.

The growing use of motherfucker in American popular culture may mean the term through time has become less offensive to some, but some see its increasing ubiquity as a sign of the general coarsening of American society.
See definition for examples of usage. My wording from Wikipedia, the online encyclopedia.
by deeceevoice September 15, 2004
 
7.
An insult or an explitive, addressing somebody who sleeps (ie. has sex with) one's mother. Often used to describe someone that you hate, but it's also used among close friends as a term of affection.

Still, in a way, a father, stepfather, or stepmother is a motherfucker; who else would be fucking one's mother?
Son: "'Sup, motherfucker?"

Father: "I'm your father! Don't talk to me like that!"

Son: "I meant literally. How else do you think I got here?"
by Lorelili March 13, 2006