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A day you get off of school because it's so cold that melted snow/rain turns into ice and its too dangerous to drive/ run the busses. It's common in Chicago suburbs.
-phone rings-

alex: "dudee why the hell are you calling me so early?!"

max: "Dude, no school! ICE DAY!"

alex: "for real?! Shit, I'm going back to sleep!"
by LMLYM7 July 06, 2008
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