Definition of johnny-cake:
(n) :
A diminutive of the male given name John.
(n) :
(slang) An Englishman.
(n) :
(slang) A jack (playing card).
(n) :
(UK, Ireland, slang) A condom.
(n) :
(New England) A hospital gown: a gown with a back opening closed with snaps or ties, worn by hospital patients.
(n) :
(New Zealand, derogatory) An inexperienced new worker, usually an immigrant.