MFM
MFM stands for "male-female-male," a threesome arrangement involving two men and one woman.
MFM is an initialism used in dating, swinging, and non-monogamy communities to denote the participant composition of a threesome: two men and one woman. It is one of several related shorthand labels (alongside MMF, MFF, FFM) that describe both who is present and, often implicitly, the structure of sexual contact. A commonly cited distinction separates MFM from MMF: in an MFM encounter, the two men typically do not engage sexually with each other and interact only with the woman, while MMF configurations may involve contact between the men as well. This distinction is not universally rigid. Some sources and communities use MFM more loosely as a synonym for any two-men-one-woman threesome regardless of male-male contact, while others treat the ordering of the letters as meaningful shorthand for who initiates or is centered in the encounter. Because usage varies by community, the term functions more as a quick descriptive label than a fixed technical standard. MFM appears frequently in dating app profiles and swinger-community listings (often alongside terms like ENM, poly, or unicorn) to signal interest in or availability for this specific threesome configuration, as well as in erotica and romance fiction as shorthand in cover copy or tagging. It has no confirmed connection to unrelated uses of the same letters, such as the podcast title "My Favorite Murder."