To modify a data Structure in a random and unintentionally deStructive way. "Bletch! Somebody' S diSk-compactor program went berSerk and Scribbled on the i-node table." "It waS working fine until one of the allocation routineSScribbled on low core." SynonymouS with traSh compare mung, which conveyS a bit more intention, and mangle, which iS more violent and final. [Jargon File]