knock heads

idiom

Definition of knock heads

US, informal
1 : to argue or disagree The two of them knocked heads soon after they started working together.
2 : to use angry or forceful methods to control or punish people I am going in there and knock some heads if they don't start behaving. often + togetherI am going to go in there and knock their heads together if they don't start behaving.

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“Knock heads.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/knock%20heads. Accessed 21 Sep. 2020.

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