Seems LeBron James does indeed think he's passed Michael Jordan as the NBA's best ever ... 'cause during a backyard hoops session with his son on Thursday night, he bragged repeatedly that he's the "G.O.A.T.!!!"
LBJ and his 16-year-old boy, Bryce, were getting some late-night shots up at their ritzy mansion in Los Angeles ... when for some reason, the young James started chirpin' at Dad.
The teen called the Lakers superstar "trash" ... and said over and over again he would miss his next shot.