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. Sure, Sheila still became valedictorian, but Tim really gave her a run for her money!
Farlex Dictionary of Idioms. © 2024 Farlex, Inc, all rights reserved.