Green’s Dictionary of Slang

(orig. US) euph. for motherfucking adj.

a.1972		in G.M. Simmons et al. Black Culture 219: That M-F-in’ jive [HDAS].
1995		CNN Sat. Morning 17 Jun. [CNN-TV] A little two year-old girl has said, ‘I want to be an m.f. gangster’ [HDAS].