kick someone's butt

idiom

Definition of kick someone's butt

US, informal + sometimes impolite
1 : to attack and injure someone severely Some drunk threatened to kick his butt.
2 : to defeat someone easily or completely She'll kick your butt in tennis.

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“Kick someone's butt.” The Merriam-Webster.com Dictionary, Merriam-Webster Inc., https://www.merriam-webster.com/dictionary/kick%20someone's%20butt. Accessed 6 December 2019.

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