stands for "rather be blazing"
Hey. You want to rbb 5th?
Sure. As long as we got time to get my 30.
Really brap boiz.
A term widely used in high schools in the UK. RBB is a team of manz who aim to help the local community by planting flowers, picking up litter & helping old people across the road.
Hey ma'am, i'm in the RBB and i'm gonna help you across this road!