Definition of "supremo"

supremo

/suːˈpɹiːməʊ/

noun
plural supremos or supremoes
1. (informal) The most important person in an organization.
  Quotations
  Kitchener was, of course, Secretary of State for War and virtual military supremo.
  1986, Peter King, The Viceroy's Fall: How Kitchener Destroyed Curzon
  Egyptian antiquities supremo Zahi Hawass insisted Tuesday that Tutankhamun was not black despite calls by US black activists to recognise the boy king's dark skin colour.
  Sep 25, 2007 - Tutankhamun was not black: Egypt antiquities chief (AFP)
  The hard launch of what appeared to be the hottest new relationship in town – Billanna? Winty? – at the 2023 Met Gala saw Vogue supremo Wintour, who has hosted the Met Gala for 30 years, walk the red carpet arm in arm with the dashing and debonair Love Actually star, a man Clive James named “the nation’s leading male sexpot”.
  2023 May 2, Samuel Fishwick, “The ‘secret romance’ that got everybody talking at the Met Gala”, in The Independent‎