A person that has sex with a female that has given birth to a child.
John: You do know that woman that wants you to marry her has a house full of children don't you?
Bubba: No that might be why she was so eager to be with me and I had sex with her last night too!
John: You did? You mother fucker!
An upside-down triangular patch of hair below a male's bottom lip. Sometimes known as a "soul patch" or "flavor saver." It is referred to as a mother fucker because the person sporting it automatically looks like a mother fucker. It is most often seen on middle eastern men who frequent clubs and show their chest hair.
Did you see Sam at the club last night? He has a motherfucker. What a mother fucker.
noun: a person who "fucks" or has sexual intercourse with ones mother.
also known as an obscenity used excessively when greatly intoxicated with alcohol
as said while going back and forth from throwing up in the bathroom-
"you mother fucker what the fuck are you doing here?i fucking hate this you mother fucker.mother fucker this sucks"