1. spectators who watch horse races from the rail around the track
Usage: informal
2. people who closely follow and observe sports or other activities, especially as regular spectators
Usage: informal

Examples

• The railbirds gathered early to get the best spots along the fence.
• Experienced railbirds could predict which horses would perform well.
• The old railbirds shared stories about legendary races from decades past.
• Local railbirds knew all the jockeys and trainers by name.
• The railbirds cheered loudly as the horses rounded the final turn.
• She became one of the regular railbirds at the weekly races.