It's been 80 years since the humble chocolate bean was given a snappy new name. But the Smarties we know and love started out as the butt of an unsavoury joke dreamed up by mischievous confectioners.

If you opened your stocking on Christmas Day to find Nestlé's most popular chocolate sweet among the toiletries, toys and tangerines, it's not surprising.

But as you crunch them slowly one by one - or more likely, tip them into your mouth straight from the tube - have you ever wondered how they got their name?

To read more on the BBC:

http://www.bbc.co.uk/news/uk-england-42244389