crock:
(plural: ‘crocks‘; pronunciation: the letter ‘c’, the first and the fourth, in this word is said with a ‘k’ sound)
(mostly British old usage) an old person who is too weak to work;
a person who wants/demands medical treatment for imagined illness (though there is no real illness)

a crock
Our gardener is an old crock… can’t work any more but doesn’t accept the fact that he’s become old and weak and so doesn’t want to quit the job, and the most difficult task for us is to convince him to have an assistant to help him do the hard jobs.
Nobody in our family likes to take Melisa to a doctor for the simple fact that she’s not a real patient and there is nothing wrong with her, but, like every other crock, she believes she’s suffering from some deadly disease and needs immediate medical care which is denied by the doctors at the hospital because she’s a crock!

(a crock -- an old car still in use)

a crock -- a person with imaginary disease
Note 2: ‘Croc’, without a ‘k’ but with the same pronunciation, is the short form for a crocodile.
