to be extremely upset, angry, and/or agitated.
(Common American Idiom)
He bought a ticket for that specific flight, so therefore he was really fit to be tied after the airline agent refused to issue him a boarding pass.
by Gary Dunn May 29, 2006
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My teacher was fit to be tied when my classmate said She didn't know the answer.
by The Return of Light Joker September 17, 2008
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