From Longman Dictionary of Contemporary Englishdickydick‧y1 /ˈdɪki/ adjective British English old-fashioned WEAKweak, and likely to break or not work properlydicky heart/ticker (=a heart that is weak and not very healthy)
Examples from the Corpus
dicky• We didn't know the railings was dicky.dickydicky2, dickey noun [countable] DCCa false shirt front or collar worn under a suit or dressOrigin dicky (1700-1800) Probably from the male name Dicky dicky1 (1700-1800) Origin unknown 