1 definition by Syko/Aran

Top Definition
As of August 13th, 2009: International Suit Up Day.

STFU stands for "Suit the fuck up." It should be said when someone is not legendary (i.e not wearing a suit.) Should be said to anyone not wearing a suit on International Suit Up Day.
Person A (Wearing a suit) walks up to Person B (not wearing a suit)

Person A: "Dude STFU"
by Syko/Aran August 13, 2009

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