Old Tupi, Ancient Tupi or Classical Tupi (Portuguese pronunciation: [tuˈpi]) is a classical Tupian language which was spoken by the indigenous Tupi people of Brazil, mostly those who inhabited coastal regions in South and Southeast Brazil. In the words of Brazilian tupinologist Eduardo Navarro, "it is the classical indigenous language of Brazil, and the one which had the utmost importance to the cultural and spiritual formation of the country".
Old Tupi belongs to the Tupi–Guarani language family, and has a written history spanning the 16th, 17th, and early 18th centuries. In the early colonial period, Tupi was used as a lingua franca throughout Brazil by Europeans and Amerindians, and had literary usage, but it was later suppressed almost to extinction. Today, its sole living descendant is the Nheengatu language.
