A KompAppella
A KompAppella is like a group of people throwing their voices around like they’re in a fight and making up fake instruments as they go.
My KompAppella was so wild, my brother thought I was possessed.
During my KompAppella, I clapped so hard, my hands were sore for a week.
My KompAppella made the whole block think there was a loud party in the middle of the street.