Green’s Dictionary of Slang

(Irish) exhausted.

1961		T. Murphy Whistle in the Dark Act III: Sick as a dog, bunched completely, not worth two-pence. And I couldn’t stir, I’m telling you. Not for hours.
1977		J. Plunkett Coll. Short Stories 281: Naturally, there was no sense at all in singing to a house as poor as that. ‘You’re bunched, Danny,’ I said .