The Big 4 phrase was originally coined to describe the four pillars of the thrash metal scene: Metallica, Slayer, Megadeth and Anthrax. But that can be spread to other genres and decades. What do you think are the big four of 80s Bands? Here is the list one music came up with.
Guns N Roses
Def Leppard
Van Halen
Motley Crue