The phrase became famous as a catchphrase of Michelle Tanner on the ABC sitcom Full House, which ran from 1987 to 1995. Played by Mary-Kate and Ashley Olsen, Michelle delivered the line with a thumbs up as an enthusiastic yes. Clips and reruns kept the moment in circulation for decades, and later social media turned the short audio into a reusable reaction for agreement. Its childlike confidence and nostalgia keep it popular long after the original series ended.