Como dizer "Cai dentro" em inglês

Hello folks, today I was watching an 1 minute funny parody of the famous movie ''The Lion King'' on youtube, and I get everything the movie says but one phrase. Can you guys help me out?

I'd like to know how to say ''Cai dentro'' in english. (Get into a fight)

You might be thinking, but what my first phrase have in common with the second one? I'll explain now.

In the parody I've said before, at 0:43 seconds, Scar says something to Simba, it seems like '' Put it up '' or maybe ''Put it me up '' Because there's a ''M'' sound there. (and it would probably be a phrasal verb, because I see no sense) but I'm not sure about that. And it's clear that the meaning of what he says is ''Cai dentro'' by the way he gesticulates.

Therefore... I'd like to know all the possible ways to say: ''Cai dentro'' and if what Scar says on the video is really it.
I'll post the video for you folks watch, that's a funny 1 minute video.

REGARDS!