A phrase derived partly from the French (du Jour - 'of the day') used to describe the largest breasts (Rack) seen on a girl seen that day, or sometimes within an arbitrary time frame such as on an evening out. Thought to have originated in the early 1920s in the French Quarter of New Orleans.
Christ alive Orville, look at those tumblers. She's got to have the Rack Du Jour!
by BrianTrousers February 08, 2009