steal sb´s thunder

předejít  něčí záměr, ukrást nápad, předběhnout

Your most startling, persuasive or important points should not go in the introduction; do not let the introduction steal your thunder. BNC

I kept quiet about my pregnancy because Cathy was getting married, and I didn't want to steal her thunder. CIDI

Senator Johnson accused the President of stealing his thunder on the tax issue. MED

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