The word "bunce"

As used by RoF's Fence Foal. This used to be in common currency and deserves wider usage imo. 

My understanding of 'bunce' was money.

After looking into it, it seems I'm a bit wrong. Apparently it usually implies someone has been overcharged or someone has earned more than they should....which means this sentence is correct:

'Laz makes decent bunce'

Cooper and Webb were baffled when David Brent used it in The Office complete with hand gesture and overbite

this is exactly what I think of when I hear the word "bunce". And Brent gauchly explaining: bunsen burner, nice little earner".   hehehe!