To attack someone or something as a group.
An argument or fight in which one side is greatly advantaged by being more numerous or more closely allied than the other side.
To cause a group of people to lie in a pile upon another, originally as a punishment to the victim on the bottom.
To jump into such a pile.
To act similarly with regard to residential density: to live or cause to live in high-density settlements.
A disorderly pile of people formed by jumping upon a victim.