(Usenet, probably from mainstream "puppy pile") 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.
Last updated: 1994-12-08
Try this search on Wikipedia, OneLook, Google
Nearby terms: dogcow « dogfood « dogfooding « dogpile » dogwash » Do It Right the First Time » Dojo