Top Definition
Shut The Fuck Up You Twat!

Originally a random assortment of letters that just happened to appear in that order. They were confused by the person reading the letters as an abbreviation for something and STFUYT was born.
Person 1: Hi mate

Person 2: Hi mate your mom!

Person 1: STFUYT!

Person 2: =(
by Josh Webster January 11, 2008
5 Words related to stfuyt

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