Exit. I'll take a 50/50, definitely phoning a friend and I don't trust the audience.
The person who came up with Brexit, must have been racist's (that is a strong statement Suf? I know, but this a blog and IMHO counts? Yes?No?). It should have been called EU Referendum, Leave or Stay, in the European Union. Not. Get out U! Or there is the exit, leave... The person who came up with it wanted out and wanted you to think out, 'other' people out, too. And Bropen would have upset too many people, and let more people in for hugs and stuff.