steel horse

plural steel horses

1. informalA motorcycle.

   I'm a cowboy / On a steel horse I ride / I'm wanted dead or alive

   1987, Jon Bon Jovi, Richie Sambora, “Wanted Dead or Alive”

   2 more examples

   So, anyway, Jeff and I were whipping along, two totally stoned organic machines, riding a steel horse and grinning ear-to-ear like madmen.

   2000, Lori Varosh, Jim Hallas, I Am the War, page 23

   Growing up in southern California, the C.H.P. and L.A.P.D. both had motors and I often daydreamed about how cool it must be to sit astride a steel horse, roaring with the thunder only a Harley provides […]

   2005, Jim Geeting, The Badge Part Two - More Thoughts from a Retired State Trooper, page 43