subs. (racing).—A saddle. Hence KNIGHT OF THE PIGSKIN = a jockey.

1

  d. 1870.  DICKENS [quoted in Century]. He was my governor, and no better master ever sat in PIG-SKIN.

2

  1898.  The Sporting Times, 26 Nov., 3, 3. After a few days’ rest he was in the saddle and has again electrified English turf followers by riding rings around their crack KNIGHTS OF THE PIGSKIN.

3