What is home again home again jiggity jig?

"Home again, home again, jiggity jig" is a popular nursery rhyme and saying that is often used to convey a sense of contentment and happiness upon returning home from a journey or a day out. The phrase is typically said in a sing-song or playful manner to express joy at being back in familiar surroundings.

The origin of the rhyme is unclear, but it has been referenced in various forms in literature and popular culture over the years. It is commonly used by parents or caregivers to soothe and comfort young children after a long day or trip away from home.

Overall, "home again, home again, jiggity jig" conveys a sentiment of comfort, safety, and happiness associated with returning to one's home environment.