This phrase came up recently on a football (soccer) fan forum for a team in my birthtown Edinburgh in Scotland. It was being used as a variant on the ‘trained chimp’ of even a trained chimp could do this (easy task). I have dim memories of the phrase being used by my dad probably in the seventies (the epoch’s seventies, not my dad’s!). ‘Bairn’ is a child in Scots English. ‘Erse’ is ‘arse’ or for the Leftponders, ‘ass’ or ‘butt’.
Well (or ‘so’ for the younger amongst us, ok I’ll stop the parentheticals now), of course someone also then wondered what the origin of the phrase was.
I just thought I’d give this forum’s members a chance to hazard a guess as to the origins. Eeehhh, without googling or other artifice! Just have a go from instinct!
Will later report back with the findings of the jury and worse.