In the wake of the referendum held in the United Kingdom on 23 June 2016, many new pieces of Brexit-related jargon entered popular use. ;ref name="BBC News 3/19" ;BBC. (2019). "Brexit: Jargon-busting guide to the key terms" (BBC). Retrieved 29 March 2019. ;/ref ;
The word "Brexit" was named as Word of the Year 2016 by the publishers of "Collins English Dictionary".
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31 January 2020, the day the UK ceased to be a member of the EU. The date was originally set for 29 March 2019 at 11 p.m. GMT, but was moved three times: first to either 12 April or 22 May, depending on whether or not a withdrawal agreement was ratified; then to 1 July or 31 October, depending on whether or not the UK held European Parliament elections; and finally to 31 January 2020.
A derogatory variant of Brexit, used chiefly by its opponents. It is a portmanteau of the terms Brexit and shit (a profane word referring to faeces).
See also Irish Sea border, Northern Ireland Protocol, Windsor Framework, and Brexit and the Irish border. 
UK domestic law has defined "exit day" for the purpose of dealing with the domestic consequences of Brexit, but the date is not formally linked to UK's departure from the EU.
A "flextension" was also how European Council president Donald Tusk characterised the extension to 31 January 2020, which allows the UK to leave before the deadline, on the first of any month, if by then a deal has been approved by the UK and European parliaments.
The 'Norway-plus model' proposed a similar but closer relationship with the EU: this proposed in addition that the UK would join the European Union Customs Union.
A document setting out the intended future relationship between the UK and EU. The declaration formed the basis for the trade agreement negotiations that started once the UK left the EU. Unlike the withdrawal agreement which is a legally binding treaty, the political declaration had no legal force.
T.
Take back control:
A treaty between the UK and the EU, setting out the terms for the UK's withdrawal. The first version was agreed in November 2018 but was rejected by the UK parliament three times. ;ref name="BBC News 2/19" ; ;/ref ; The agreement contained the contentious Irish backstop, which was one of the reasons for opposition to it. The failed ratification led to the resignation of the UK prime minister, Theresa May, and her successor Boris Johnson sought to renegotiate it despite the EU's refusal to do so. In October 2019, the EU and the new UK government agreed a new version of the withdrawal agreement, with the backstop replaced by a different solution to the Irish border problem. The new agreement passed its second reading in the House of Commons in December 2019, following a general election in which the Conservatives won a decisive majority.
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