course rat
n.— «“He’s what I call a course rat,” Robichaud said. “All my juniors are. They’re always at the course, always playing. A lot of times they’d go from a match at Monoosnock and they’d get in their cars and hit a bucket of balls at Lancaster Golf Center.”» —“Pioneers, Sammies are champions” by Bill Doyle Telegram & Gazette (Worcester, Massachusetts) Oct. 24, 2006. (source: Double-Tongued Dictionary)