railbird
/ˈreɪl ˌbɜrd/
noun
- A person who watches horse races from the rail at the racetrack, often a regular or enthusiastic fan.
- The railbirds cheered loudly as the horses thundered past the finish line.
- A group of railbirds gathered early to get the best view of the track.
- Every Saturday, the old railbird stands at the same spot by the fence to watch the races.