Black Friday - a day that Black slaves were sold at a discount, for most British shoppers, only started in the last couple of years and is symbolized by fights over flat-screen TVs.

First introduced to the UK by Amazon, now a range of retailers such as Tesco, Argos and John Lewis discount prices.

The term first began in the US, where Black Friday follows Thanksgiving on the last Thursday of November.

There are plenty of rumors circulating online about how the day of sales first got its name - but which one is true?