CALL THE POLICE ... 'cause a rap star got straight up VIOLATED at a celeb hoops game this weekend by a street ball legend ... and the video is sensational.
The victim is Mac Miller -- who's currently dating Ariana Grande -- and happened to be playing against Bone Collector at the Power 106 Celebrity Basketball Game at USC.
Mac tried to play some defense on Bone ... and it ended BADLY.
Condolences to Ms. Grande ...
