Green’s Dictionary of Slang

1. the testicles.

2000		S. Maloney Big Ask 235: ‘So I shouldn’t shove you up against that Jasper Johns and stick my tongue down your throat?’ ‘Not unless you fancy a swift kick in the Jackson Pollocks.’.
2003		B. Dark Dirty Cockney Rhy. Sl.

2. nonsense, rubbish.

2002		D. Shaw ‘Dead Beard’ at www.asstr.org 🌐 ‘Jesus, but you really come out with a load of jackson pollocks!’ Monica snapped.
2003		B. Dark Dirty Cockney Rhy. Sl.