Go to war
When two criminal enterprises engage in violent attacks on each other for control of power and the flow of money
Tony Montana: You wana go to war? Wel take you to war!
Going to war with the Grammar Nazis
Something you shouldn't do.
Guy 1: I think you're are stupid.
Guy 2: Clearly going to war with the Grammar Nazis with that sentence, eh?
Guy 2: Clearly going to war with the Grammar Nazis with that sentence, eh?