Someone who hates a day of their work week because others have it off, which severely alters their mood, especially Mondays.
Jen- "Happy mutha fuckin' Monday!"
Kris- "Quit being such a bubbly ass bitch on Monday! I HATE MONDAYS!!!"
Jen- "I'm off on Mondays. Quit being a daycist."
by Boo Boo Kitty Burrito May 23, 2011
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A person who intently discriminates on when to kick it based on certain days
"I only like to kick it on the weekends and not weekdays."

"Dude your an ignorant daycist."
by DIRB ENT April 10, 2009
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