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Contraction of "shit" and "day"
John: Hey dude what's up? You don't look too good!

Sam: I got up this morning. I slipped in the shower. Mistook pimple cream for toothpaste, walked in dogshit on my way to work, got scolded by my boss and then got in an argument with another colleague for silly stuff. Today was a total shiday!
by sabnet2000 June 07, 2010
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