abr. -Sit on my Face; To face sit; the art of sitting on the opposite sex's face with out under wear and get oral sex.
Dude, Your girl said you was asking her to do a S.O.M.F. to you.
Shit on my face. The new F.M.L.
Boy: Oh god I have a huge project thats do tomorrow, I haven't even started.
Girl: That suck brahh
Boy: Yeah, S.O.M.F.