give someone or something a run for their money

give (one) a run for (one's) money

To challenge one's ability, fortitude, or patience. Don't underestimate our opponents today—I think they'll give us a run for our money. Having an infant and a toddler sure is giving me a run for my money.See also: give, money, run

give someone or something a (good) run for their money

provide someone or something with challenging competition or opposition. 1997 Rugby World Beaten Welsh Cup finalists Swansea gave them a good run for their money for much of the campaign before fading away. See also: give, money, run, someone, something