Timothy Joko-Veltman on fri 23 feb 07
Flame: Definition 6 at http://www.webster.com/ : "an angry, hostile,
or abusive electronic message"
"electronic message" here can be a on mailing list, in a forum, or in
private email, though usually not the latter.
People who flame deliberately are sometimes referred to as trolls.
If someone has been flamed and responds in kind, the ensuing "fight"
is called a "flame war".