Rick Ross -- Making 'Big Moves' with Adrien Broner

Rick Ross says he's not just party pals with boxer Adrien Broner -- the two are getting ready to make some BIG business moves together ... and TMZ Sports has the inside scoop.

Ross appeared on "The Breakfast Club" with Charlamagne Tha God Thursday and said he's been VERY impressed by the boxer ... who recently started his own record label.

"Me and Broner, we actually having discussions," Ross told Charlamagne ... "I don't wanna let everything go yet. But me and Broner actually having discussions about doin' some things."

Our sources tell us ... the conversations have been focused around Broner's "About Billions" record label -- which has a stable of some up and coming rappers, including Young Butta.

We're told Ross likes what Broner brings to the table -- and are in talks about some kind of joint venture in the very near future.

Stay tuned ...