Jesper Bo Parnevik (born 7 March 1965) is a Swedish professional golfer. He spent 38 weeks in the top 10 of the Official World Golf Rankings in 2000 and 2001.
Parnevik was born in Stockholm, Sweden. He is the son of the Swedish entertainer Bo Parnevik. His place in the pantheon of golf stars stems from both his playing achievements and his distinctive and eccentric taste in clothes and fashion.
Parnevik's on-course trademark was the upturned bill on his baseball cap. This became so much his trademark that, when he played on the European Ryder Cup team, he received a customized team cap with the Ryder Cup logo on the bottom of the bill instead of the front, so that it could be seen when he turned up the bill. He has since stopped wearing the flipped-bill hat, and now wears other types of eccentric hats. His flamboyant fashion sense, featuring disco-style purple trousers and other golf apparel designed by Johan Lindeberg, has been politely described as "eclectic," and he's been known to change outfits at the halfway stage of a round of tournament golf. As of 2006, one of his new trademark on-course fashion statements is a necktie worn under a vest. He is also famous for eating volcanic dust as a dietary supplement.