If something unlucky, ridiculous, incredible, etc were to happen, you yell this. The number of times you say "dirtay" determines how bad the event was (ex: 10 dirtays is very bad)
(Z.D. shoots a basketball, it hits the rim, but rolls in and out)

Z.D.: (Screaming) DIRTAY DIRTAY DIRTAY DIRTAY!
Mullet: (rofling) Dirtay Dirtay!
by darcy mcgee December 9, 2008
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