Well, bugger me with a fishfork, but I never knew you were a trainspotter, Roly!
Online dictionary....riiiiiiiggggggghhhhhhhhhhttt....
I mis-read the thread title. I thought it said 'flogging' - so was a Navy bum and baccy question. Looked again and thought it said 'fagging' - much the same, just delete the baccy.....