Defunct term cited in bar books which is theorized to have been a corruption/typo for Les Peres Chartreux, the name given to Chartreuse during the period 1903-1940 when it was produced solely in Tarragona, Spain. The only reference to this product with this spelling was in a drink named the Cubano. Its first appearance was in the Savoy Cocktail Book (London 1930). In 1934, "Cocktail Bill" Boothby listed the recipe in his guide with the ingredient entirely eliminated, as did Trader Vic in 1947. Ever since, (as here,) "Charbreux" only shows up in recipe lists which draw from the Savoy book - or from the books which drew from those books!