(of a part of the body, a structure, or a device) not strong, healthy, or functioning reliably

a pianist with a dicky heart

a false shirt front

a white dicky with a black string bow tie

a folding seat at the back of a vehicle

the Plymouth looks great with its wooden spoked wheels and it even has the original dicky seat

the boot of a car

I have to get the dent in the dicky repaired at that time