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1.
1.(Noun) an extremely lazy/stupid/indifferent/unkempt person whose prime motivations are either sustenance or sleep-based.

2.(Verb) sub par in every way: "That 'classy' dinner party was real shidassed, we ate our Kraft mac and cheese off of the Hello Kitty Happy Birthday plates that WE brought."
1."That dude is the biggest shidass I have ever seen. The only words I have ever heard come out of his seemingly never closed mouth are 'Are you gonna eat that, hoss?'"

2. "That 'classy' dinner party was real shidassed, we ate our Kraft mac and cheese off of the Hello Kitty Happy Birthday plates that WE brought."
by SamsonTheEliminator May 10, 2010
 
2.
Shidass (shid-ASS) -interjection-: a combination of the english words "shit" and "ass". Describes really awful situations.
Awwww shidass... I gotta work at 3 in the morning tomorrow!
by AA AE OO July 11, 2009