Meaning of “peaky” in the English Dictionary

british dictionary

"peaky" in British English

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peakyadjective

uk /ˈpiː.ki/ us /ˈpiː.ki/ mainly UK US usually peaked informal

slightly ill, often looking pale:

You look a bit peaky, love, are you all right?

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