When the donkey fazools
This term dates back to 1678 when King Julian III was in rule of Kingdom Fazool. The actual meaning of this term is lost in history but archaeologists determined that it was a slur for anyone who lived in Fazool.
1) Substitution word for comedic effect.
2) Default answer to any trivia question where you don't have a clue.
3) Standard answer used by Cliff Arquette (Charlie Weaver) on Hollywood Squares in the 1960's.