Blueface got into a knockdown, drag-out fight with gf Chrisean Rock on the streets of Hollywood early Tuesday morning ... and it's all caught on video.
It appears Chrisean is the initial aggressor, following the rapper as he walks down the street and grabbing at his shirt, yanking him backward.
Blueface then slugs Rock in the head, knocking her to the ground and ripping off the chain around her neck.