A "Belter" refers to a person from the asteroid belt in the Outer Solar System, particularly in the context of the science fiction series The Expanse. Belters often have unique cultural traits and speak a distinct creole language known as Belter Creole, which incorporates elements from various Earth languages. Belters typically work in mining and resource extraction, living in space habitats or on asteroids. Their environment leads to physical adaptations, such as taller and leaner bodies due to lower gravity. The term also highlights the socio-economic struggles faced by these communities, often depicted as marginalized in relation to Earth and Mars.