give someone 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
Farlex Dictionary of Idioms.

give someone a run for their money

INFORMAL
COMMON If you give a very skilful person or team a run for their money in a competition, you compete as well as them, or almost as well. The British team gave the host side a run for its money to finish a close second in the team competition. We think the Irish will give the Welsh a good run for their money.
See also: give, money, run, someone
Collins COBUILD Idioms Dictionary, 3rd ed.
See also:
  • give (one) a run for (one's) money
  • give someone or something a run for their money
  • show (someone) what (one's) made of
  • what you are made of
  • what (one) is made of
  • what somebody is made of
  • stand tall
  • an all-out effort
  • walk tall
  • walk tall, to