/seuh pree"moh, soo-/ , n. , pl. supremos . Chiefly Brit. Informal.
1. the person in charge; chief.
2. a person of supreme or complete power, authority, ability, etc.: His victory makes him the new chess supremo.
[ 1935-40; supremo, both supremus SUPREME 1 ; E sense perh. esp. El Supremo as the title of Latin-American dictators, e.g., J. G. Rodríguez Francia (1766-1840), Paraguayan dictator ]