1.To go dumb. simple
2. Carefree lifestyle, originated in the bay.
Jimmy: Ghost ride that whip, and pass that purp!
Joey: Ok, but your going to have to shake them dreads.
Jimmy: Man pass that blunt!(while shaking his dreads going dumb on the hood of the car)
Joey: Man ur hella hyphy! keep it up and ur going to ride that yellow bus!