Another word for an abnormally strong male relationship, that two individuals might have. They don't necessarily have to be gay, but enjoy being in the presence of each other a lot. They go golfing, watch football, go shopping, ring each other etc.
Playa hater: Ay yo Andy, where tha bum boys at?
Andy: Wahhh? chris and tom?
Playa hater: yo
Andy: They bum boys, yo no wots hattnin