ftsm 

Acronym for:

Fuck That Shit Man

Guy 1: I play for the Thrillkillers
Guy 2: FTSM

ftsm by gyfh May 5, 2005

FTSMF

"Fuck that shit motherfucker"; or, "Forget that stuff, my friend" in case your pastor overhears you. A strong expression of disagreement or rejection.

You: Hey man, instead of having that threesome with your girls tonight, hang out with me while I go to the Department of Motor Vehicles.

Me: FTSMF

FTSMF by apex swims the ocean January 15, 2008

FTSMN 

friend that sends me nudes.

"we're friends, you're a great friend. a ftsmn"

FTSMN by comeatmebro677 October 9, 2014