“Brixit” (Great Britain/British + exit) is a word created to define a possible British exit from the eurozone. “Brixit” has been cited in print since at least June 2012. A similar term—“Brexit” (Great Britain/British + exit)—is from May 2012.
 
“Bremain” (Great Britain/British + remain) was coined to describe Great Britain remaining in the eurozone.
 
“Grexit” (Greece/Greek + exit) was coined in February 2012 and started the naming trend.. “Gerxit” (Germany/German + exit) and “Spexit” (Spain/Spanish + exit) both date from May 2012.
 
   
Wikipedia: United Kingdom withdrawal from the European Union
United Kingdom withdrawal from the European Union (sometimes referred to by the neologisms Brexit or Brixit for “British exit” and “Britain’s exit” respectively) is sought by Eurosceptics who believe Britain would be better off outside the trading bloc. No member state has ever left the European Union although in a 1975 referendum, the United Kingdom voted to stay in its precursor the European Economic Community, after having joined in 1973.
 
In January 2013, British Prime Minister David Cameron promised a referendum on British membership of the European Union if the Conservative Party are returned to power at the next general election.
 
Terminology
In mid-2012, the terms Brexit and Brixit were coined for the concept of the United Kingdom ceasing to be a member of the European Union. These slang terms are portmanteau words formed from Britain or British and exit. The Centre for European Reform has been credited with the invention of the term Brexit, though it was previously used by The British Resistance. The term Brixit was coined by the Economist columnist Bagehot, in the article A Brixit looms, dated 21 June 2012.
     
The Economist
Britain and the EU
A Brixit looms
Jun 21st 2012, 15:49 by Bagehot
MY PRINT column this week considers the political implications in Britain of the deepening euro crisis: ...
 
Financial Times—Alphaville
Towards a Brixit
Posted by Masa Serdarevic on Jun 27, 2012 08:45.
Just when you had had enough of Grexits, Greuros and Drachmageddons, here’s another irritating term to add to the eurozone crisis lexicon: Brixit. Yes, the genius fusion of the words Britain and exit to describe another gloomy scenario.
 
The word was coined by The Economist’s Bagehot column this week (although apparently it is also the name of a Swedish shop that sells Lego) to describe an event that it argues no British political party wants but is nevertheless likely to happen. (The story of the euro crisis, surely?)