When an entire band chants lyrics to make put more emphasis.
"dude did you hear the brocals in A day to remembers new song?"
"yeah especially the beggining when they did the brocal breakdown."
"yeah it was like:"
(entire band at once) "duduh duduh duduh duduh duh duduh duduh"
"yeah and then the part where they went:"
(entire band in unison again) "THREE FOUR FIVE!"