scatter band
n.— «I’m talking about the Marching Owl Band. The MOB. The Goodfellas of Groove. The MOB is what they call a scatter band, which means its members’ idea of a formation is running around like someone just dropped a hand grenade down their shorts.» —“Don’t blink; you might miss Rice’s MOB hit” by Mark Wangrin Austin American-Statesman (Texas) Sept. 17, 1999. (source: Double-Tongued Dictionary)