From Discworld & Terry Pratchett Wiki
A pune or a play on words is often spoken by Discworld characters when they tell a not very funny joke based on word play.
Named after the founder of the Fools Guild one Jean-Paul Pune who, in his magnum opus, Essay on a form of wit devotes 160,000 words to defining the Five Great Classes and seventy-three sub-classes of the Pune or play on words, which all students at the Fools' Guild are expected to commit to memory on pain of pain.
The very name Pune is a pun, or play on words, on the Roundworld word pun.
There is a professional cricket team in the Indian Premier League called the Pune Warriors. Terry Pratchett would approve.