What does “bust it” mean?

Native speaker’s answer
Rebecca
That is a great question. "bust" can have different meanings depending on the situation it is used in. In this situation, Finn and Jake the Dog say "let's bust it" when they are entering the store undercover to try and stop Cookie Guy from taking over the hostages. So here, "bust it" means to "break it up" or to "stop it". It's similar to saying, "Let's do it" but with the purpose of breaking or stopping something.