Not safe for Mind. When something is so retarded that the usual facepalm is not enough to express the extreme disappoinment and frustration.
by ixigia:face: November 05, 2010
Not Safe For Mom. It might be safe for work, but you don't want your mom reading it -- especially if it's on your blog.
by Snjr7e923 November 29, 2006
Not safe for Muppets; An outfit or a picture that would get banned on Sesame Street after Katy Perry was censored for her cleavage in her duet with Elmo.
Your Facebook profile pic is NSFM, too much boobage!
That top is so NSFM, I can practically see nipple!
That top is so NSFM, I can practically see nipple!
by Rockstalker September 24, 2010
The NSFM tag originated in Reddit's /r/trees community of marijuana lovers. It means the post is Not Safe For Munchies, so you should avoid looking if you don't want to be hungry.
by LivingDeadInside July 02, 2014
by Iwakura Lain September 20, 2005