Although not the title I was told that 'tyumun' was a dialect word for empty.
It was being used in a written song about children working in the pits.
I asked if there were any other songs with the word in and the singer said yes - the one with the chorus 'Jowl Jowl and listen lad and hear the coal face working'So I got out my song book and looked for this word.
Eventually I realised that it was the line 'Whilst the putter shoves t'empty uns', presumably misheard by someone unfamiliar with t'explosive t's