:cross-post: [USENET] vi. To post a single article simultaneously to
several newsgroups. Distinguished from posting the article
repeatedly, once to each newsgroup, which causes people to see it
multiple times (which is very bad form). Gratuitous cross-posting
without a Followup-To line directing responses to a single followup
group is frowned upon, as it tends to cause {followup} articles
to go to inappropriate newsgroups when people respond to only one
part of the original posting.
-- The AI Hackers Dictionary
dogpile: [USENET: prob. fr. mainstream "puppy pile"] v. When
many people post unfriendly responses in short order to a single
posting, they are sometimes said to "dogpile" or "dogpile on"
the person to whom they're responding....