Green’s Dictionary of Slang

exhausted, tired out.

1999		G. Seal Lingo 89: It is sometimes said that rhyming slang is an obsolete form, though a couple of comparatively new coinages suggest otherwise: germaine greer beer and, especially piquant, kerry packered for knackered.
2003		B. Dark Dirty Cockney Rhy. Sl. 71: Kerry Packered – knackered.