all hell breaks loose
- (idiomatic) The situation becomes chaotic or characterized by conflict or rage.
1992 August 19, “Beckel, Barnes and Rollins Discuss the Republican Convention”, in CBS_Morning:
- I think it's kind of fun because, had Hillary Clinton spoken at the Democratic Convention, all hell would have broken loose.
- Both as a sentence and a clause this term allows all normal conjugation of the verb.