crock
n.— «Hospital staff privately refer to them as “crocks”—people who repeatedly show up in emergency rooms demanding expensive, exhaustive tests to unearth the elusive cause of their numerous symptoms. Reassurance that their tests don’t show anything amiss has the opposite effect, convincing these patients that physicians haven’t looked hard enough—or don’t believe them.» —“Cognitive therapy answers the unexplained” by Sandra G. Boodman Quad-City Times (Davenport, Iowa) Aug. 31, 2006. (source: Double-Tongued Dictionary)