NSTF

Not Safe To Fuck

Pretty self-explanatory.

Angela has a bad case of the brown starfish, her asshole is NSTF.

by acablue January 19, 2009

NSTFS

Written abbreviation for "No Shit, True Fucking Story." Commonly used by fighter pilots, often at the beginning of a story about an adventure or exciting event.

Entry in the doodler book.

"NSTFS, there we were..."

by DeX696969 April 24, 2016

NSTF

NOT STUPID TO FALL

FAKE GIRL - Im sorry.

Me - NSTF NOT STUPID TO FALL

by Lil2328jjjw October 7, 2018