be (as) thick as thieves Meaning in the Cambridge English Dictionary
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Meaning of “be (as) thick as thieves” in the English Dictionary

"be (as) thick as thieves" in British English

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be (as) thick as thieves

informal to be very ​closefriends and ​sharesecrets, etc.: I'm ​sure she ​tells Ruth everything we say - they're as thick as ​thieves, those two.
(Definition of be (as) thick as thieves from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)
Translations of “be (as) thick as thieves”
in Chinese (Simplified) 亲密无间,非常友好…
in Chinese (Traditional) 親密無間,非常友好…
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