knock on wood Meaning in Cambridge English Dictionary
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Meaning of "knock on wood" - English Dictionary

knock on wood

US (UK touch wood) informal
said in order to avoid bad luck, either when you mention good luck that you have had in the past or when you mention hopes you have for the future: The deal will be agreed on Wednesday, knock on wood.
(Definition of knock on wood from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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