Iggy Azalea -- Clowns Nick Young ... Your Lakers Have NO GAME (VIDEO)

Iggy Azalea is talking so much smack about Nick Young and his teammates ... you'd think she and Swaggy had been married for 30 years already.

Iggy and Nick were on vacay in her native Australia, and BSO picked up a solo media stop she made down under ... while Nick was in the gym. When the interviewers asked if it was that important for Nick to practice ... the shade started flying.

Problem for Nick and the Lakers is, in this case, she ain't really lying. Still, Iggy got a sweet-ass engagement ring out of the deal -- so, she might wanna ease up off a brotha.

Just sayin'.