shanks' pony

dog and pony show

Any presentation or display that is overly contrived or intricate, while lacking real substance.

flog a dead pony

To attempt to get more out of something that cannot give more; to attempt to arouse fresh interest in something that is either hopeless or already settled.

one-trick pony

A person or group noteworthy for only a single achievement, skill, or characteristic.

pony in the barn

An exciting and real prospect, something to be legitimately excited about.

shanks' mare

One's own feet used for walking; to "travel by shanks' mare" or "ride [on] shanks' mare" is to walk to your destination.

shanks' nag

Transportation by foot. To "take a shanks' nag" means using one's own legs to walk.