BF noun 8verb 2forms 6 noun8 •Initialism of boyfriend.A Belgian friend of one of my p. b.f.’s (platonic boy-friends) said you were going to marry M.F. and she was awfully attractive. — 1929 •Initialism of best friend. •Initialism of bodyfat. •Initialism of breastfeeding.Am I the only one here?? Whenever I start feeding Matthew I feel like I'm making others uncomfortable. — 2002 •(slang, old-fashioned) Initialism of bloody fool.You really are a B.F., Arthur. — 1939 •Initialism of booking fee. •Initialism of bisexual female. •Initialism of black female. verb2 •Initialism of breastfeed or its inflections.See if you are already meeting all the criteria for successfully BF'ing your DD. — 2005 •Initialism of brought forward. formsBF'd · BFed · BF'ing · BFing · BFs · bfs