You are wrong.
"Coup" is a shortened, anglicized version of the original latin res, and attendant French Coupe d'Etat, or Coupe of the State, which was in ancient times a chariot specially outfitted to transport the new leaders of the government.
It was usually a a two-wheeled horse-drawn vehicle used in battle but for parade use as a Coupe, or coup would be adorned as deemed appropriate to the occasion by the new leaders of the state.
Modern variants, now four-wheeled, keep the traditional spirit of martial adornments including the "laurels," symbols of absolute executive power, one sees for instance below the modern Cadillac badge.
Coups, in their various incarnations, have been employed as symbols of power trans-historically and by transcendent figures ranging from Marcus Junius Brutus of Rome to Elvis Aaron Presley of Memphis and Francis "Big Frank" Francomano of Kennebunkport.
