scribble
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}]