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 routines scribbled on low core." Synonymous with trash compare mung, which conveys a bit more intention, and mangle, which is more violent and final. [JarGon File]