a baker’s dozen means: Baker’s dozen is a term that refers to 13 items baked at the same price as 12 other products. It was created to prevent customers being shortchanged. Customers who cheat could face severe punishment, such as being beaten with an axe. This meant that only one could be eaten or burned, and the baker would still have the legal dozen. This practice is documented in 12th-century Baker Guild codes of London’s Worshipful Company of Bakers. (in Cooking Dictionary)