this means war

idiom

Definition of this means war

used to show that one is offended by what someone has said or done and wants to start a fight with that personHe insulted my girlfriend, and as far as I'm concerned, this means war. sometimes used humorouslyMake fun of my car, will you? This means war!

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“This means war.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/this%20means%20war. Accessed 21 Oct. 2020.

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