Top definition. My father. My father is a mother fucker , that's how I was born. A common slang derived most popularly from a form of " yo momma jokes " but actually dating waaaay the hell back to the '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".
Motherfucker sometimes abbreviated as mofo , mf , or mf'er is an English-language vulgarism. While the word is usually considered highly offensive, it is rarely used in the literal sense of one who engages in sexual activity with another person's mother, or his or her own mother. Rather, it refers to a mean, despicable, or vicious person, or any particularly difficult or frustrating situation. Alternatively, it can be a term of admiration, as in the term badass motherfucker , meaning a fearless and confident person.