This is a band called Loudness:

I had never heard of them until a friend of mine passed along the link. Japanese metal, my friend. Zebra-striped spandex, funny-shaped guitars, big hair, and the lyrics “You come to see the show/Well, we’re gonna rock and shock you/Come on get on your feet/The sound hits you in the face, alright/Ohh, let’s get so crazy tonight!”

It’s hysterical.

“But why are they chanting MZA?” I asked him. “What does that mean?”

He directed me to an interview the band once did at Dinosaurrockguitar.com where the band explains:

DRG: In the song Crazy Night, what does M-Z-A mean? We’ve been wondering for 20 years!

Niihara: Actually it does not have any meaning. When we were doing pre-production for the Thunder in the East album, I did not have any lyrics for Crazy Night then, so I sung total nonsense as a guide vocal for the demo recording. I sung “M.Z.A.” by accident and the producer Max Norman liked the line, even though that did not have any meaning. We were trying to create some cool line but we could not beat “MZA.” Max ended up deciding to use “M.Z.A.” for the real take.

Haha! That makes it even better.

(Thanks to Robby for sharing.)