from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A mound of people, especially people who are fighting or celebrating.
- n. Any indiscriminate jumble of things.
- v. To jump on top of someone, usually in a group.
- v. To pile on or overwhelm, such as with criticism or praise.
From dog + pile, from analogy with a group of dogs sleeping in a pile. (Wiktionary)