1 definition by jcgreengw

Top Definition
A slang term in reference to the calendar year 2011. Due to "YO" being the call on a Craps table for a roll of 11.
I want to wish all my friends and family a Happy 20-YO.

Graduating next spring means I will be a member of the class of 20-YO.
by jcgreengw December 30, 2010

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