noun Informal.

a horse-racing fan who watches races or workouts from the railing along the track.
any kibitzer or self-styled critic or expert.

Nearby words

  1. rail gun,
  2. rail rage,
  3. rail rapid transit,
  4. rail-splitter,
  5. railage,
  6. railcar,
  7. railcard,
  8. railhead,
  9. railing,
  10. railingly

Origin of railbird

1890–95, Americanism; rail1 + bird in sense “frequenter,” as in jailbird, yardbird

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019