noun
a large group of people or things that are closely packed together in a disorderly way
verb
to jump on top of someone or something in a disorderly way
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The children formed a dogpile as they played in the park.
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Let's dogpile on John when he walks in the room!
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We all dogpiled on the last slice of pizza.
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The company faced a dogpile of lawsuits after the scandal was exposed.