OH DEAR! Popular Rapper Blasts His Mother

Romeo has some divorce advice for his mom - if you want $67 million ... you need to earn it, and it starts with being a good mother.

Romeo opened up last night about his mom and dad ... Sonya Miller and Master P's split -- and her legal demand for a chunk of his empire ...

Here is what he said;

"Honestly, I love my mom to death, but I mean - we gotta just work out some things. She gotta be a better parent, y'know."

It sounds like he's referring to Master P's allegations that Sonya is smoking marijuana around their children ... which she's denied.

What's interesting is Sonya's been living WITH Romeo, but he's backing his dad in this divorce.

TMZ.