The term is mostly used in the midlands where there is a higher concentration of illegal sports, eg. dog fighting, cock fighting, child fighting.
Brenden: "And how did you get out of that one, Seamus?"
Seamus: "Ah I just slipped him a few Itchy Sugarlumps and he doddled off, the big Bollox!"
Brendan: "Ah your some boyo, Seamus!"