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a hybrid of the words "hyper" and "tired", it means exactly that: a physical and mental state in which one is so tired that they become hyper and energetic, often accompanied by finding even the most simple things more humorous than they normally would be
after a long day at school, and a long night at work:

Jim: It's been such a long day.

John: Oh, I know, I'm so hyred. Everything is so funny right now.
by D-Teezy April 02, 2008
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