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to go off, to get extremely upset. to have anger so great that nothing matters but releasing said anger.

play on the word meltdown and the name of actor Mel Gibson who has had a history of anger issues.
If my wife asks me to take the trash out one more time, i think I'm going to have a mel-down.
by Hank Morgan IV July 12, 2010
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When Mel has an emotional outbursts and has a breakdown over nothing.
"Mel is haveing a Meldown"
by Meldown August 09, 2017
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