A woman's under-petticoat. It's all Dicky with him; i.e. it's all over with him.
·noun A gentleman's shirt collar. II. Dicky ·noun A false shirt front or bosom. III. Dicky ·noun A...
Webster's Dictionary of the English Language
an ass. Suff. ...
A glossary of provincial and local words used in England by Francis Grose