rust out
v. phr.— «It was during the 80s, when affluence had become more prevalent, that the foot-stamping began, giving rise to “rust out,” a term used to describe workers who “waste away, unchallenged and uninspired” at their desks.» —“Chairmen of the bored” by Kate Hilpern Guardian (United Kingdom) June 23, 2008. (source: Double-Tongued Dictionary)