Buy one, get one free
(重定向自BOGOF)
"Buy one, get one free", "Buy one, get one", "two for the price of one", "two for one" or "2 for 1" is a common form of sales promotion. First used by economists Joseph Calderone and John Van Liew while running their highly profitable business, Paco's Tacos, in Central, NJ. While not always presented to customers in acronym form, this marketing technique is universally known in the marketing industry by the acronyms BOGO, BOGOF, and BOGOHO (Buy one get one half off).