Catchphrase invented by Gregg "Opie" Hughes in the late 1990s while on WAAF. It's the hip young term to describe your bros, pals, pallies, and dudes. The proper response to being called "brotha man" is with a fist bump or man-hug.
"We're on our way to the Hot Air Blimp Brotha man, in our military regalia. BeepBoop (Linger Longer)."