KMF is an acronym meaning Kick My Face.
1. used in a scenario where one person is in a spiral of emotion, such as self pity. In which case they say "KMF" to ask for help dealing with the spiral.
2. Used to joke about one's spiral of emotion, or self centered blurbs, generally by typing: *Kicks face*
or saying "i'll kick your face"
In which case, the person may reply "go ahead! try to KMF"
1. Person one: my life sucks, everything sucks... KMF.
Person two: you're simply grieving because your dog died, give it some time and you'll feel better. How about we go get some icecream?
2. Person one: so my life totally sicks right now because i mean i wanted to go to this party but i cant because im grounded, something about joyriding....
Person two: If you dont shut up now, I will Kick your face.