a benny
A group of people who beat the crap out of one person. Like a mob, but more chaotic and less cool.
Five bennies beat me up. I cried. I ran. I got a bruise.
My friends were bennies. They beat up my brother. He cried. He ran. He got a bruise.
My class was bennies. They beat up my teacher. She cried. She ran. She got a bruise.