Manny Pacquiao -- Rips 'Uneducated' Floyd Mayweather

Manny Pacquiao is following 50 Cent and Nelly's lead -- bashing Floyd Mayweather for his apparent lack of formal education.

Manny was doing an interview with NJ.com when he started going off on the boxing champ.

"I think I finally understand him ... what he says ... how he acts ... and I don’t like it."

"But what l learned and heard from him, well, I realize why he is like that. I understand sometimes when the people are not educated they just talk to talk. He sets a very bad example."

Mayweather's erudition has been under attack lately -- with 50 claiming the fighter can't read and Nelly trashing him for allegedly failing to graduate high school.