I don't know of Binky in any context whatsoever Reg
It's from the 'Discworld' novels by the late and much missed Terry Pratchett.
Binky was Death's horse.
Oh I see I haven't read any of him.
You are missing out if you have any form of humour.
Oh I have a superfluity of that alright and 9 years on here has broadened my tolerance as well