(noun): Traditionally occurs the first day of June. First celebrated in 1981, but not recognized as a populist South American holiday until 1999. Although it is derided by some as just another effort to promote a cult of personality, most accept its significance as a Day of National Forgetfulness and Drinking.
Example 1: Holy wowsers, it's Trey Day... where the shit are the kegs?

"It's Trey Day, baby!" - B. Plance
by Tunico June 01, 2006
Top Definition
Trey Day October 2nd 2007. The release date for R&B singer TREY SONGZ sophomore album named TREY DAY
TREY DAY will sell 1 million copies +
by TINA MS5000 October 01, 2007
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