1. horses that perform well on muddy racetracks
Usage: horse racing
2. participants in obstacle races or events involving mud
Usage: informal

Examples

• The trainer specializes in developing mudders for rainy season races.
• Some horses are natural mudders and actually prefer wet track conditions.
• The mudders crossed the finish line covered in dirt from the obstacle course.
• These mudders trained all winter for the tough muddy marathon.
• The betting odds favor the mudders when rain is forecast for race day.