Meaning of 'Give someone a run for their money'

What does the saying 'Give someone a run for their money' mean?

Idiom: Give someone a run for their money

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Similar Idioms

• Give up the ghost
• Money laundering
• I hereby give notice of my intention
• Give someone a piece of your mind
• Money to burn
• A fool and his money are soon parted
• Give it some stick
• Pin money
• Give someone enough rope
• Give your eye teeth
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• Not give a fig
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• Not give the time of day
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• Give the shirt off your back
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