mailbomb
(also mail bomb) [Usenet]
1. v. To send, or urge others to send, massive amounts of {email} to a
single system or person, esp. with intent to crash or {spam} the
recipient's system. Sometimes done in retaliation for a perceived
serious offense. Mailbombing is itself widely regarded as a serious
offense -- it can disrupt email traffic or other facilities for
innocent users on the victim's system, and in extreme cases, even at
upstream sites.
2. n. An automatic procedure with a similar effect.
3. n. The mail sent. Compare {letterbomb}, {nastygram}, {BLOB} (sense
2), {list-bomb}.