Shaquille O'Neal just posterized Damian Lillard on wax ... coming out of rap retirement to roast the NBA superstar in a new diss track.
Shaq came out firing after Damian went on "The Joe Budden Podcast" and questioned the NBA legend's rap skills ... and the diss track proves the big man still has bars.
The basketball Hall of Famer pulls out all the stops in his rap comeback, calling Dame a worse player than Trevor Ariza ... and saying the Portland Trailblazers point guard can't hold a flame to real MVP candidates like Steph Curry and Russell Westbrook.