A stale joke is one that has been heard many times before and is no longer funny. The crossword solutions for the term 'stale joke' are 'CHESTNUT' (8 letters), 'OLDIE' (5 letters) and 'oldchestnut' (11 letters). CHESTNUT is a term used to describe an old joke that has been told many times, while OLDIE is another word for something that is old or outdated. Oldchestnut is a combination of the two words, referring to an old joke that has been told many times.