Green’s Dictionary of Slang

(orig. US campus) to have group sex, usu. a gang-rape.

1972		E. Sanders Family 52: Acid-zap, mind-moil, role-playing, bunch-punching, magic.
2003		M. Turner ‘Charlie and the Devil’ Part Two at CharlieManson.com 🌐 The family evidently believed that there was an archetypal core personality in each human that could be discovered through acid-zap, mind-moil, role-playing, bunch-punching, magic, blasting-the-past and commune-ism.