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English definition of “be as high as a kite”

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be as high as a kite

informal to behave in a silly or excited way because you have taken drugs or drunk a lot of alcohol: I tried to talk to her after the party, but she was as high as a kite. to feel very happy and excited: I was as high as a kite when I heard I'd got the job.
(Definition of be as high as a kite from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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