The challenge was brought by Yalland and Wilding, who runs the pro-single market organisation British Influence. Wilding is credited with inventing the term Brexit in 2012.
It is quite conceivable that someone else might have invented the term, or a better term, but I do think it's a case of shooting yourself in the foot if you invent a handy label (misleading, vague, delete as appropriate) for something you don't want.
I find this interesting:
https://www.theguardian.com/politics/2017/feb/03/fresh-brexit-legal-challenge-blocked-high-court-article-127
It is quite conceivable that someone else might have invented the term, or a better term, but I do think it's a case of shooting yourself in the foot if you invent a handy label (misleading, vague, delete as appropriate) for something you don't want.