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Phrase Meanings » go through the roof
What does "go through the roof" mean?
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Also, hit the ceiling or roof. Lose one's temper, become very angry, as in Marge went through the roof when she heard she'd been fired. [Colloquial; first half of 1900s]
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Reach new or unexpected heights, as in After the war, food prices went through the roof. [Colloquial; first half of 1900s]