MtF is short for Male to Female, meaning that someone who was assigned male at birth has gone through surgery to be female since they are happier that way.
This terminology is often used especially within the military (I.E. if someone gives out a list or set of instructions that are subject to change at any time, they end it with "more to follow").
Tonight, I'm going to hit the hash pipe, borrow my friend's car; then we'll see where the night takes us from there. Mtf..
Fred: "Is it just me or are ya'll really close?"
Me: "Yeah but it's nothing serious. We're MTF."
Fred" "MTF??? What the hell?"
Me: "yeah, MTF... you know, more than friends???"
MTF has a VERY high potency, One of the BEST type's of weed in the US. MTF (Matanuska Thunder Fuck!) is rare because it is grown out in "The Valley" (A.K.A Matanuska-Susitna or Mat-sue) of ALASKA!
Tourist: Aye homie I need a dime bag of this magic weed "MTF" I keep hearin bout.
Alaskan: NIGGA, DIME BAG!? You can have this shit(MTF) here by the Eighth, Ounce or Quarter. I dont break bags foo. This shit here is M T F.