In Reply to: Like a blue arsed fly posted by Karen on April 17, 2010 at 08:12:
: 'Back & forth like a blue arsed fly'.
: Any idea who uses that saying or where it came from?
I have no idea where it came from, but it is in use where I now live in Kent in South-East England. I am not sure how widespread it is, but I had never heard it before coming here from Ireland.