dead as a door-nail/a harring/mutton/the,a dodo

úplně mrtvý, zapomenutý, dořešený, smetený ze stolu

The Congo Treaty may now be regarded as being as dead as a doornail. (OED)

The Radicalism of Mill is as dead as the dodo. (OED)

Mr Menzies refused a request for a boycott saying he had hoped this was as dead as the dodo. (OED)

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