bogofs

Kay Staniland, head of the consultancy Assosia, said: "Having reported last week that it was dropping bogofs [buy-one-get-one-free] in favour of being transparent in its price cuts, such small cuts could be seen as simply trying to retain the cheapest title rather than passing on any real savings to the consumer."

2009 March 9, Ashley Seager, “Half of Asda's price cuts 'worth just 1p an item'”, in The Guardian