One of the unusual moments during Mark Mardell's Thanksgiving bash came when Mark called the election-campaigning Donald Trump "Donnie Darkmouth". It's a phrase he appears to like as he also used it in his latest BBC News website blog post:
Because the President-elect was so brutally frank about his extreme prescriptions on the road to power, he can afford to tone it down a bit now. Donnie Darkmouth can, to an extent, morph into Temperate Trump.
Where did he get that from? Neither Google nor Twitter are bringing up any results for 'Donnie Darkmouth'. Did he borrow it from someone or make it up himself?