Green’s Dictionary of Slang

jaba juntz n.

a non-specific object, ‘stuff’.

[UK]T. Taylor Baron’s Court All Change (2011) 58: [I]f they want to paint or write or sculpt they’re given all the necessary jaba juntz.
[UK]T. Taylor Baron’s Court All Change (2011) 135: I found the necessary jaba juntz and poured three stiff ones out.