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Opposite of gtfo meaning "stay the fuck in."
Older brother: "Hey kid, GTFO."
Younger brother: "How about I just STFI?"
by Popcorn Man June 24, 2006
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abbreviation of 'search the fucking internet', sometimes used in games when somebody askes a dumb question which he could easily look up on the internet
Person 1: "Where do I start this quest?"
Person 2: "STFI!!"
by Rholdadc December 28, 2008
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abbreviation for "sure the fuck is" . Usually used in a sarcastic tone.
person1: "Isn't it nice to be treated like that?"
Person2: stfi
by J_hoe February 13, 2008
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