(T)otally (N)ot (F)unny
Derived from the necessity for a reply to such acronyms as:
#Jolly_Roger: I fucked a bitch whitout a rubber last night!

#Mental_Man: Don't worry, abortions tickle anyway!

#Mom_to_be: tnf!
by Oondeenie Queu December 24, 2004
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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.
by Stungirl<3 November 23, 2012
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tnf - to scream and act irrational, to fake fainting, syncope and sickness in order to attract more attention than the dead person. Usually affects only black females.(typical nigger fit) medical terminology. The name for what a black family does when a loved one dies.
by kdd April 1, 2005
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tnf, (known as tommynotfound) is a ship name for popular content creators GeorgeNotFound and TommyInnit. Their relationship is totally platonic though.
tnf is shit
by tnfishorrible July 25, 2022
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Used when some annoying 11 year old says 'lol' at innapropriate times on MSN.

Scott: Wuu2?
Emma: Nothing much
Scott: LOL!!!!!
Emma: TNF o.o

Emma: My dog just died..
David: LOL
Emma: TNF T_T
by Emmaaaa :) January 2, 2009
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Ex. Team no foreskin on three! One , two, three! Team no foreskin! #TNF
by #tnf August 5, 2017
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Someone who is retarded beyond belief.
You speak like TNF.
by Aadam Almakky August 1, 2021
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