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rubber-stamp

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rubber-stamp something

if someone rubber-stamps a decision or a plan, they give it official approval, often without thinking about it enough

Usage notes: If someone official has examined a document, they often put a special mark on it using a rubber stamp (= a small printing device made of rubber).

School governors will not simply rubber-stamp what teachers have already decided. The court was asked to rubber-stamp the Department's decision to free the men.