dicky2

 
Pronunciation: /ˈdɪki/

adjective (dickier, dickiest)

British informal
  • (of a part of the body, a structure, or a device) not strong, healthy, or functioning reliably: a pianist with a dicky heart

Origin:

late 18th century (in the sense 'almost over'): perhaps from the given name Dick, in the old saying as queer as Dick's hatband