pull the rug from under someone/something

pull the rug from under someone/something

or

pull the rug from under someone's feet

COMMON If someone pulls the rug from under someone or something or pulls the rug from under someone's feet, they suddenly stop helping and supporting them. Just when we got close to saving the shipyard, the Government pulled the rug from under our feet. The banks may yet pull the rug from under the project.
See also: pull, rug, something
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