phrase: Don't get me started

Hello, I'm a beginner learner, I try to find a explanation for this phrase "Don't get me started" in whole forum and in the internet, but I didn't find it. May anyone help me?

Thanks!

"Se tem alguém que pode me dizer em português eu agradeço!"

¿Entiendes español?

Significa algo así como "no hablemos de esto porque no podría dejar de despotricar sobre el tema"

You would use that when you want to stop one from complaining or when you have many things to say.