Meaning of “go through the roof” in the English Dictionary

british dictionary

"go through the roof" in British English

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go through the roof

C2 to rise to a very high level:

Prices have gone through the roof.

C2 also hit the roof informal to get very angry:

When I was expelled from school, my parents went through the roof.

(Definition of “go through the roof” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)