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3.
A disagreement on an Internet message board wherein one person says something wrong or offensive, and a large number of people comment in response to tell the person how wrong and/or horrible they are, and continue to disparage the original commenter beyond any reasonable time limit.

People commenting at the same time, without realizing others are jumping on the person as well, do not make a dogpile. The requirement is to join in with an angry group to yell at an easy target, or to get popularity points for being seen to agree with the group. They see that everyone else is doing something, and they copy it.

The original commenter typically does not respond at all, because they are completely overwhelmed or scared off. Once a dogpile has been established, an apology from the original commenter is less likely to be effective.
A dogpile in action

A 10:00 AM: "That song is retarded."

B 10:01 AM: "Um, that's really offensive."

C 10:01 AM: "That's not an okay thing to say."

D 10:02 AM: "Fuck you."

E-Z over the next 12 hours: "FUCK YOU, ASSHOLE."

A: "Sorry, I didn't realize that word was offensive."

12 different people: "Stop trying to backtrack, you piece of shit!"
by boehnerinmypants April 21, 2011
 
1.
A group of people jumping on on person and creating a tower of people while crushing the people on bottom.
If some one falls over everyone nearby jumps on him/her thus creating a dog pile.
by Tim Booth July 03, 2006
 
2.
The act of everyone piling on top of one person, such as in a football game where everyone dogpiles the one with the football.

Or another example is, everyone attacking one person, even though they weren't present, simply because one person is angry at them.
"Everyone dogpiled his ex even though they didn't know her or know the situation."
by Kristilicious August 24, 2005
 
4.
A group of people jumping on one person and taking him down to the ground, then more people jumping on top of the pile.

If you have ever witnessed a litter of hungry puppies all go after a piece of kibble or a table scrap at the same time, you can appreciate the similarity. They collide and climb on top of each other after the piece of food.

Likely gained popularity a word used for when, on a football field, a player is tackled by multiple players. A lot of high school football teams are named (insert name of school here) Bulldogs.

Also known as a pileup or a crush (the person on the bottom of the pile feels crushed under the weight of the others)

Other definition: The name of search engine that gathers links from other search engines in its searches (in visual imagery, having all the other search engines jump on your inquiry)

Other definition: A group of dogs or puppies all sleeping in a group in one place with their heads, feet, and bodies under, over, and on top of each other

Other definition: a mound of dog feces

Related word: bum rush
"How did you hurt your leg?"

"I was running down the field with the ball and tripped on my shoelace which had come undone. James jumped on me, then all the rest of them dog piled on top of me."
by Bryonia March 30, 2010
 
5.
A Dogpile is when a group of people actively decide to cause extreme pain by jumping onto an individual forming a pile of "dogs".
A group of people (normally sized 5-20) decide on someone to Dogpile. Once the target has been taken to the ground, the group will jump/dive onto if the target to cause extreme squashing and intense pain. The activity is usually accompanied by screams of "dog pile" and "owch" and outsiders kicking and throwing stones/sticks on the pussies who joined at the top.
by MatzWhat May 05, 2011
 
6.
1. A rambunctious occurrance in which all people in a group who are rowdy and socially adept enough to perform it all throw themselves onto the ground in a big laughing pile.

2. A less rambunctious occurance in which one unwilling participant is buried in hundreds of pounds of human flesh.

3. A shout which precipitates either 1. or 2.
1. DOGPILE! - Laughing heap of people ensues. -

2. DOGPILE! - A scream. The rest are laughing. -

3. DOGPILE!
by 'Annony' June 11, 2005
 
7.
a search engine that helps you find what you need like porn, music,wrestling.
i searched on dogpile and found some great naked hot girls.
by jiM March 12, 2005