A Hummer is a brand of vehicles known for their large size and rugged design, originally based on military vehicles. The first model, the Hummer H1, was introduced in the early 1990s and gained popularity for its off-road capabilities and distinctive appearance. In the early 2000s, the brand expanded to include models like the Hummer H2 and Hummer H3, which were more suited for everyday use while still maintaining a robust look. Hummers are often associated with a lifestyle of adventure and outdoor activities, but they have also faced criticism for their fuel consumption and environmental impact.