The largest omnivore is a matter of debate, as there isn't a single agreed-upon definition of "omnivore" and size can be measured in different ways (weight, height, etc.).

However, some strong contenders for the title include:

* The Polar Bear: While primarily carnivorous, polar bears do consume berries and vegetation occasionally, making them technically omnivorous. They are the largest land predator and can weigh up to 1,500 pounds.

* The Brown Bear: Similar to the polar bear, brown bears have a diet that includes both meat and plants. They are massive animals, reaching up to 1,500 pounds in weight.

* The Walrus: These large marine mammals are primarily carnivorous, feeding mainly on clams and other invertebrates. However, they also consume seaweed and occasionally seabirds, making them omnivorous. Walruses can reach up to 4,000 pounds.

* The Human: Humans, with their highly diverse diets, are arguably the most versatile omnivores. While their average weight varies widely, the heaviest recorded human weighed over 1,400 pounds.

Ultimately, the title of "largest omnivore" depends on how you define "omnivore" and "largest." It's a fun topic to explore!