go mentalBritish EnglishBrE spoken informal a) ANGRYto get very angry 非常生气
b) CRAZYto start behaving in an uncontrolled or excited way 行为失常，发疯
go mental• We're at the same position here as we were when we were selling out Harlow Square with the audience going mental.• Back home, the missus is going mental and your dinner's in the dustbin.
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