chapeau

Meanings

1. A hat.
2. A cap of maintenance.
3. The mass of grape solids that floats on the surface during the fermentation of wine.
4. The text at the start of a numbered section of a legal document that appears directly beside the section number, ahead of any numbered subsections.
5. A passage of introductory text appearing in a treaty that broadly defines its principles, objectives, and background.

1. well done, thank you a verbal representation of a hat tip

Etymology

Borrowed from Middle French chappeau. The interjection is after Modern French chapeau in similar use, originally short for chapeau bas.