Definitions
1.NounA disorderly pile of people formed by jumping upon a victim.
2.NounAny similarly disorderly pile of people or things.
3.NounA pile of dog excrement.
4.NounThe situation where many participants attack the same user (on a discussion forum or similar).
5.NounA cache stampede.
6.VerbTo jump into a dogpile.
7.VerbTo pile on, to overwhelm in other senses.
8.VerbFor many participants to attack the same user (on a discussion forum or similar).