nastygram: /nas'tee-gram/ n. 1. A protocol packet or item of
email (the latter is also called a letterbomb) that takes
advantage of misfeatures or security holes on the target system to
do untoward things. 2. Disapproving mail, esp. from a net.god,
pursuant to a violation of netiquette or a complaint about failure
to correct some mail- or news-transmission problem. Compare
shitogram, mailbomb. 3. A status report from an unhappy, and
probably picky, customer. "What'd Corporate say in today's
nastygram?" 4. [deprecated] An error reply by mail from a daemon;
in particular, a bounce message.