M.
- Mastectomy - Removal of breasts.
- Medical Tattooing - Tattoos which are used to cover up surgical scarring, or to otherwise make a body part to look more "normal."
- Metoidioplasty - A type of FTM bottom surgery.
- M.H.T. - Masculinizing Hormone Therapy
- Minoxidil - A substance used to stimulate hair growth.
- Mirdam - Gender neutral version of sir or ma'am.
- Misgender - To refer to someone using the incorrect pronouns.
- M.O.G.A.I. - Marginalized Orientations, Gender identities, And Intersex
- M.P.B. - Male Pattern Baldness
- M.T.F. - Male To Female
