Point of no Breturn
The portmanteaux just keep on coming — most recently in "Brexit's fallout: Adrift", The Economist 7/2/2016, we get a section heading "Point of no Breturn". See also (updated from the comments):
[link] Are You Brexhausted yet?
[link] Not “Brexit” but “Braccident”.
[link] Newspaper headlines: 'BoJo Brexecuted' on Tory 'Day of Treachery'
[link] #brexecution
[link] Is this the beginning of a Canary Wharf Brexodus?
[link] Are You A Brintrovert Or A Brextrovert?
[link] Brexit, Bremain or Brextraneous?
[link] GLUM BLOND Inside story of Tories’ Borexit: How BoJo’s career was left in tatters a week after he thought he’d be next PM
[link] Bregret? Regrexit? Don’t bet on it.
[link] #brexshit
[link] Brexistential crisis
So far, brexhortation, brextrinsic, and a few others seem to be open.
For previous forays into the lEUxicon, see
"Grexicography", 6/22/2015
"OtherCountries_ExitFromTheEU: better portmanteaux", 6/23/2016
"You Brexit, you bought it", 6/25/2016