The phrase 'For the Fun of It' means just for the entertainment value of doing it.
Example of Use: "We went on a picnic just for the fun of it."
Interesting fact about For the Fun of It
The idiom 'for the fun of it' has its origin in the Old English words 'fonne' and 'fonnen', which preceded the 17th century English word 'fon'. The way in which the idiom is used demonstrates the elusive nature of fun itself – something experiential, inherently pleasant, and typically far from routine.
