Top Definition
A day in which you and your friends dress in tuxes and dresses while eating at a fast food joint such as Burger King. You would be suprised at people's reactions....
Tammy: Barbie!! We should totally do something today!

Barbie: Yeah totally, why don't we have a Formal Day?

Tammy: KK
by bloo regard Q kazooo June 26, 2011

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