The meaning of the word bunce
BUNCE (n.) – a colloquial word meaning money or profit.
This 19th century word was almost obsolete by the 1960s, until an ironic revival in the ‘greed-is-good’ 1980s.
More recently it has become more common as a verb – buncing – to describe the practice where shops stick new higher-price tags over the original lower-price ones.
The word’s origins are uncertain, but it might have originally been a corruption of ‘bonus’.