nastygram
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.