Instead of the regular baker's dozen of 13, this equals 11 based on the rationale that a baker would eat one item from his batch instead of adding an extra one to it.
"When I opened up the box of donuts I thought they forgot to put one in but really they were just giving me an Litos Baker's Dozen. Boy was I pissed!"
A Chinese Baker's Dozen is 11. This is because the chinese are known for always wanting to bargain to lower costs or number of goods even if this amount is immeasurable and/or insignificant to both parties. This is not a derogatory term but simply a unit of measurement.