have someone's number
idiom
informal
: to be able to deal with or defeat someone easily especially because one knows or understands that person so well
She thinks she's got my number, but I'm going to prove her wrong.
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“Have someone's number.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/have%20someone%27s%20number. Accessed 26 Nov. 2024.
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