break it down—
1. explain smth.:
- Let me break it down for you—when a dog shows its teeth, it’s about to attack you.
2. (Austral., NZ sl.) stop it; come off it (used as an expression of disbelief, disagreement or a plea for moderation):
- Let’s break it down. I said I don’t know the man. Never met him.
break it up—
1. disperse; get moving:
- A policeman forced his way through the crowd, shouting, “Stand aside! Break it up!”
2. stop the fight or quarrel:
- All right you two, break it up! Don’t make me get a hose on you…