English Phrase F4F (in personal ads or Internet slang) Initialism of female for female. Near-synonym: FSF Coordinate terms: F4M, M4F, M4M (ASMR) Of audio, a feminine or female voice using female pronouns. Coordinate terms: F4A, F4M, M4A, M4F, M4M (Internet slang) Initialism of femme for femme. Wikiwand - on Seamless Wikipedia browsing. On steroids.