Hat or other covering for the head. 
Un chapeau (masc.) is 'a hat' in English. Best Answer: Your work collegue is congratulating you. The French say chapeau (hat) as an abbreviation of je te tire mon chapeau which means I doff my hat to you. So basically you must have done something well! • CHAPEAU (noun). The noun CHAPEAU has 1 sense: 1. headdress that protects the head from bad weather; has shaped crown and usually a brim. Familiarity information: CHAPEAU used as a noun is very rare. Chapeau. The literal word comes from the French, and it means 'hat'. Aside from meaning 'hat' it is also used when giving someone respect, a short way of saying 'hat off' or 'I'm so impressed, I take my hat off'. I can swim 600 feet under water. Wiktionary (0.00 / 0 votes) Rate this definition: chapeau (Noun). A hat. chapeau (Noun). The mass of grape solids that floats on the surface during the fermentation of wine. chapeau (Noun). In international law, introductory text appearing in a treaty that broadly defines its principles, objectives, and background. Chapeau. Chapeau is a French term signifying a hat or other covering for the head. In mainland European heraldry, it is used as a mark of ecclesiastical dignity, especially that of cardinals, which is called the red chapeau. It is worn over the shield by way of crest, as mitres and coronets are.
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what does chapeau mean