plural of chapeau

A hat. / (heraldry) A cap of maintenance. / The mass of grape solids that floats on the surface during the fermentation of wine.

well done, a verbal representation of a hat tip

Wearing a chapeau.

A bicorne hat designed to be compressed and carried under the arm, formerly worn on dress occasions by men in the 18th century, and later in the United States Army by general and staff officers.