: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. For example, when a
religious missionary posts a simplistic appeal to alt.atheism,
he can expect to be dogpiled.
-- The AI Hackers Dictionary