(among doctors) a patient who makes frequent visits to a surgery, complaining of persistent but unidentifiable ailments.
〈英，非正式〉（医生用语）经常来看病却查不出是何疾病的人，看病癖者
Example sentencesExamples
Because such patients may evoke despair, anger, and frustration in doctors, they may be referred to as ‘heartsink patients,’ ‘difficult patients,’ ‘fat folder patients,’ and ‘chronic complainers.’
I recognised my scrawl and wondered if I had written this in desperation for something to do for another heartsink patient.
Imagine inviting your heartsink patients home for dinner.
My spell of tiredness has led me to investigate and investigate my heartsink patients.