a man/woman who fucks some ones mother.
is used in a diss towards some one.
you are a motherfucker. or
fuck you, you mother fucker,
go fuck your mother.
by ben haigh June 11, 2006

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The phrase is often thought to refer to a person who performs the universal taboo of fucking his own mother, meaning he is unsrcupulous.

With regards to a child's welfare, it can be seen as refering to one who has sex with a single woman who has a child. If one fucks the child's mother, one is also a motherfucker.
I found a girlfriend, but she's got a kid, but its ok because she sends him out to play when I come over - You motherfucker.
by Don Miguelito June 01, 2005

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Father, Dad, Husband, Groom
Father or Dad are unknown words.
Instead of Mother & Father, it's the Mother and the Motherfucker.
Instead of Bride & Groom, it's Bitch and Motherfucker
by Manzai March 24, 2004

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Worse than fucker; one of the worst insults you can throw at someone
"Hey, you stupid motherfucker!"
by Christy January 15, 2003

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One word with so many facets, meanings, and applications. This is not an attempt to cover them all, but merely one of them. Anyway, one facet of it can be used in the context of describing someone or possibly a group of people that gets severely taken advantage of, or totally screwed in some way, shape, or fashion.
1. The motherfucker that gets THAT used car is in for a big surprise....

2. Hear about that Tornado?....A whole lot of motherfuckers don't have a place to stay...

3. Those victims of the Haiti earthquake, Those Poor motherfuckers are in some deep dogshit now
by Evanofski of Poland February 01, 2011

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1.A curse word used in place of damn it, what the hell, and oh shit.
2. A female who has sex.
3. A female, usually a mom, who has sex with boys (MILF)

4.A male who has sex with females.
1. Motherfucker! That pisses me off!
2. Go bang that motherfucker!
3. You know Alex's mom? She is such a motherfucker.
4. You here the news? I am an official motherfucker.
by Desperateforsex May 18, 2009

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It's a compound word, motherfucker!
"You're a stupid-ass motherfucker."

"...also, that shirt makes you look like a motherfucker."

"...so, fucking yeah man, I told that motherfucker to go fuck himself."
by El Terrible March 01, 2009

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