supremo means the most important person in an organization. Lexicurio rates it Sui generis — a strength score of 89 out of 100.
supremo is pronounced /suːˈpɹiːməʊ/.
Etymology
Borrowed from Italian supremo (“supreme”). Doublet of supreme.
noun
- The most important person in an organization.“Kitchener was, of course, Secretary of State for War and virtual military supremo.”