[The "-exit" formulation used in Brexit and Grexit was coined by two economists from US financial giant Citigroup in February 2012 - it has now taken on a life of its own on social media, with eurosceptics across the continent]It started with "Grexit" -- the long trumpeted but never realised axing of Greece from the European Union. It was then reborn as "Brexit" as Britain started down the -- this time voluntary -- path of leaving the bloc.