McKenzie friend
n.— «She was also accompanied by a solicitor, David Rosen, but he was not representing her and instead acted as a “McKenzie friend,” a legal term for someone who assists a person representing themselves.» —“Heather Mills ‘screens paparazzi video in court’” by Nick Allen Telegraph (United Kingdom) Feb. 11, 2008. (source: Double-Tongued Dictionary)
Further reading
The Swedish term hemmablind literally means “home blind,” and refers to that state when you’ve lived in your home so long you no longer notice its flaws or your own clutter. This handy Swedish term is one of several introduced in the reality TV...
Funny cat videos and cute online photos inspire equally adorable slang terms we use to talk about them. • Also, when a salamander is not a salamander, the story of an Italian term for a dish towel used halfway across the world, Bozo buttons...