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
A lifeguard in Central Florida is perplexed when his fellow lifeguards indicate they’ve heard a radio transmission by responding with a phrase like Tower Two copies rather than Tower Two, copy. Which is correct? They both are. The word copy in radio...
Roderick in Jacksonville, Florida, says patients in his cardiac electrophysiology practice often look at the tangle of EKG wires on their chests and joke that now they’re wired for sound. What’s the origin of this phrase? Although to wire meaning...