"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
Me: FTSMF
by apex swims the ocean January 10, 2008