mf-word noun the word motherfuck, motherfucker or motherfucking US
If you had a nickel for every time these rappers used the “F” word, the “MF” word and the like, you might be almost as rich as they are. — ChicagoTribune, 26 July 1992
The F-word and the MF-word. — TheTimesMagazine, p. 43, 16 February 2002