heartsink
n.— «There is no doubt that heartsink patients are a great source of stress for their doctors, but at the same there must exist “heartsink doctors”—doctors that patients dread seeing, not because of what they may tell them, but because of the doctor’s personal characteristics.» —“Maybe there are also heartsink doctors” by Seau-Tak Cheung in Dundee, Australia sBMJ (London, England) Apr., 2000. (source: Double-Tongued Dictionary)