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.

a comparitive expression meaning: extremely or very.
the subject is compared to a mother fucker.
can be used to emphasize any adjective.
commonly using these forms:
"(adjective + er) than a mother fucker"
or
"(adjective) as a mother fucker"

A black person's term for anything. A white mans dude, or man.

1) A word used to describe someone who would have sex with someone older or younger than them willingly or someone who would have intercourse with their own mother as they have had a lack of relationships and sex.
2) It can also be used as a casual insult and is often used in songs, mainly in the genre of rap
It can have a suffix added to it

See motherfucking
It can be plural
See motherfuckers
It can be a verb

See motherfuck

The most common phrase said by Samuel L. Jackson

Plural to motherfucker.