The story
Coined by YouGov for a report released on May 12th 2017. Blend of Remainer + Leaver.
Etymology from Wiktionary, CC BY-SA 4.0.
Re-Leaver
Today it means: Someone who backed remaining in the European Union up until the referendum on membership, but has since changed to support for leaving, typically out of acceptance of the outcome of the referendum. Full definition →