on top of one's game

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variants: or at the top of one's game

Definition of on top of one's game

: doing something at one's highest level The pitcher is completely on top of his game tonight—the batters barely stand a chance to get a hit. A singer at the top of her game when performing before her hometown audience.

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“On top of one's game.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/on%20top%20of%20one%27s%20game. Accessed 23 Oct. 2020.

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