suicide smock
n.— «No mattress or blanket. He was only wearing what’s called a suicide smock. They found him dead in his cell at 6:45 a.m. on Nov. 30, 2005. The smock was wrapped around his neck.» —“Mental health facility ordered” by Julia Reynolds Herald (Monterey, California) May 1, 2006. (source: Double-Tongued Dictionary)