a run for your money
 a run for your money — see run, 2
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 Main Entry: money
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 a run for your money
  ◇ Someone who gives you a (good) run for your money in a game or contest makes it difficult for you to win by trying hard and playing or performing well.
   Though they lost, they gave last year's champions a run for their money.
  
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 Main Entry: run