A Business / Banker Douchebag is a corporate or banker type found in poorer countries on an outsized salary typically there on a mission to generally rape and plunder the country and it's local people. Big users of drugs and prostitution.
Look at that Business / Banker Douchebag (BBD) over there with all those southeast Asian hookers... isn't 10 a bit much for one guy?
The opposite of a Baker's Dozen where the customer receives 13 of a product for the price of 12; in a Banker's Dozen the customer receives 11 of the product for the price of 12
Hector was surprised to find only 11 glasses in his gift of 12 glasses that he received from the bank. Later, Hector learned that the Bank offers a Banker's Dozen in their gifts and products, in which they steal one item.