gym candy
n.— «Athletes and steroid use have been making headlines for years. Athletes who use anabolic steroids—sometimes referred to as “gym candy” or “juice”—want to bulk up, boost their physical appearance and get a perceived competitive edge.» —“Muscle madness: Here’s all you need to know about steroids, and why Rafael Palmeiro is in trouble” by Karalee Miller News-Sentinel (Fort Wayne, Ind.) Aug. 18, 2005. (source: Double-Tongued Dictionary)