Motherfucker

Motherfucker (sometimes abbreviated as mofo, mf, or mf'er) is an American vulgarism. Its literal sense, referring to one who participates in sexual intercourse with his own mother, is seldom implied. Rather, it refers to a mean, despicable, or vicious person, or any particularly difficult or frustrating situation or alternatively as an inverted praise of the individual or thing's "badness". Due to the semiotics, it is not generally applied personally to females, a personal direct object referred to as such is invariably male.