dickey

(noun) a small third seat in the back of an old-fashioned two-seater. Synonyms: dickie, dicky, dickey-seat, dickie-seat, dicky-seat.

(noun) a man's detachable insert (usually starched) to simulate the front of a shirt. Synonyms: dickie, dicky, shirtfront.

(adj) (British informal) faulty. Synonyms: dicky. Example: "I've got this dicky heart"- john le carre."