be (as) thick as thievesFRIENDLY 友好的 FRIENDLYif two people are as thick as thieves, they are very friendly with each other and seem to share a lot of secrets, making other people think they are hiding or planning something 非常亲密 Lately Nick and Lou have been as thick as thieves. 最近尼克和卢打得火热。
be (as) thick as thieves• Then they'd be as thick as thieves again.• All among the trees, the birds are thick as thieves and noisy as conventioneers.
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