The front part of the leg below the knee; the front edge of the shin bone: Shinbone

A fishplate for a railway.

(as "shin up") To climb a mast, tree, rope, or the like, by embracing it alternately with the arms and legs, without help of steps, spurs, or the like.

“to shin up a mast”

To strike with the shin.

To run about borrowing money hastily and temporarily, as when trying to make a payment.