Levels or degrees of being 'crusty' (salty, pissy, extremely angry or generally in a bad mood).
Wow, who pissed in Jason's Wheaties? He's reached a whole new level of CRUSTIVITY today!

Man, what's up with you? You are marinating in CRUSTIVITY this evening!
by YO-HO August 21, 2009
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A severe case of mutated vaginitis, where the discharge begins to scab over.
Donna: DAMNIT!!

Phillis: What's the matter?

Donna: MY THINGY ITCHES... AND IT'S THE WRONG COLOR!

Phillis: Uhhhh.... Why don't you try "washing" it??

Donna: NO WAY!@! - IT'LL GET WET! - *sneezes - violently... scab fragment grenades through skirt and embeds in parking lot asphalt.

Phillis: HOLY $#$^ !!! - You've got crustivitis!
by H.A.D.E November 6, 2010
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