go postal

idiom

Definition of go postal

US, informal
: to suddenly behave in a very violent or angry way She suddenly went postal and started yelling at the customers. If he calls me this late again, I'm going to go postal on him.

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Cite this Entry

“Go postal.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/go%20postal. Accessed 2 Dec. 2020.

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