Jeffrey Wayne Fatt is a Chinese Australian musician and actor. He was a member of the children's group The Wiggles from its founding in 1991 to 2012, and was also in the 1980s and 1990s pop band The Cockroaches. He was the oldest member of the original Wiggles line up. Fatt was also known for falling asleep on stage, causing the other members to utter the iconic Wiggles catchphrase "Wake Up, Jeff!", which was also the title of one of their songs.