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English definition of “run riot”

run riot

C2 If people run riot, they behave in a way that is not controlled , running in all directions or being noisy or violent : I dread them coming round because they let their kids run riot.Uncontrolled If your imagination runs riot, you have a lot of strange , exciting , or surprising thoughts : My imagination was running riot, thinking of all the ways that I could spend the money .Imagining and conceiving
(Definition of run riot from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

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