Definitions by Stungirl<3

tnf 

Short way to say "thats not funny." Usually used online, after a sarcastic laugh at something someone said.

Girl: omg I'm lik sooo hilarious, i told a joke today in class it went like this: *lame joke*

You: Hahahahahahahaa!

You: Tnf.

tnf by Stungirl<3 November 27, 2012