A Cadillac car.
The luggage storage compartment of a sedan/saloon style car.
A leather apron for a gig, etc.
A louse.
Dicky dirt = a shirt, meaning a shirt with a collar.
A haddock.
A small bird; a dicky-bird.
An insignificant sound or thing; dicky-bird.
A detachable shirt front, collar or bib.
A pilot.
A hedge sparrow.
A donkey.
like a dick, foolish or obnoxious
doubtful, troublesome; in poor condition