Generally all the coolest males in a school or social club/team will often blurt out this phrase whilst on a night out or sometimes just whenever they feel it's appropriate, could be during a game of football or even in a lesson at school.
Phone call:
Lad: Yes lads, who's out tonight?
Lads: All the beys!
Lad: Ahahahaallllaauhhhbbaaayysss!!