(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.
DOE « DOF « dogcow « dogpile » dogwash » DOL