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2.
Acronym for "Tell 'im Fuck 'im"

Dick said he did not want to go to work as reported to his boss by his work colleague. His boss retorted to Dick's colleague "TIFI" "Tell 'im Fuck 'im"
by Marco Pantini - 61 September 06, 2006
 
1.
Abbreviation for "There I fixed it"
Part of the Cheezburger - Failblog site
Silly/Funny attempts at repairing various stuff - bad repairs
- Dude ever been to TIFI?
- Errr, what does that stand for?
- There I Fixed It.
- Yea I know what are you talking about now... That is like the best part of Failblog!
by MATTony May 30, 2013