top surgery
n.— «He was in the process of legally changing his name to a male name, although he couldn’t decide whether to go casual (Rey) or Old Testament (Asher). And in December Rey underwent what he called “chest reconstruction surgery,” also known as “top surgery,” which he paid for out of pocket.» —“When Girls Will Be Boys” by Alissa Quart New York Times Magazine Mar. 16, 2008. (source: Double-Tongued Dictionary)