Baffie

[…]; the inhabitants' benign indifference to idiosyncratic behavior (the way, for example, that you could walk down the street in nothing but a pair of baffies with a budgerigar on your head and no-one would think twice of it).

[…] put him oot the door in his semmit an his baffies.

“You can’t be walking about in the muck with naught but your skirts and baffies. […]” ¶ By process of elimination I narrowed the word baffies to mean some sort of footwear.