tfs means "thanks for sharing", in a sarcastic way.
"I caught my mom and dad in bed"
"tfs, moron!"
by stian p March 18, 2006
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Means the fuck but sometimes we uses it to call my friend a tranny fucker. (Long story)
Bill: Yo Steve got drunk last night again!!!
Walter: Aww shit what he do now!?
Bill: He said he was fucking this girl in the dark but she only wanted anal!
Walter: Okay and?
Bill: All the bros said it was Kim's older brother!
Walter : What the Fuck!!!!!!!!!!
Bill: Man he's a TF now!
(Laughs all together)
by IDieEveryDay June 13, 2017
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Usually used when you have diarrhoea. Stands for Terrible Fucking Shit.
Chamir : Dude I just hit a TFS.

Theveshan: Holy crap man, your ass must have poop stains.
by Mr_Gargoyle September 23, 2015
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