- letter bomb.
- Also called email bomb. a very large number of emails sent to a single email address or computer network, usually causing a server or system crash.
- Also mail-bomb. to send a mail bomb to (an email address or computer network).
Origin of mail bomb
First recorded in 1970–75
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018