In English-speaking contexts, "tuk tuk" is the most widely recognized term globally, but they are technically known as auto-rickshaws. The name "tuk tuk" is an onomatopoeia for the sound of their small, two-stroke engines. In different parts of the world, they have various English-derived or localized names: in the Philippines, they are often called tricycles (though these are usually motorcycles with sidecars); in parts of Africa, they are known as keke napeps or bajajs; and in many South Asian countries, they are simply "autos." In 2026, you might also hear them referred to as "e-trikes" or "electric rickshaws" as the industry shifts toward green energy. Despite the variety of names, the concept remains the same: a lightweight, three-wheeled vehicle designed for short-distance urban transport. For a native English speaker, referring to them as "auto-rickshaws" is the most "proper" term, but "tuk tuk" will get you a ride almost anywhere from Bangkok to Birmingham.