1. plural of doper; people who use illegal drugs or performance-enhancing drugs
Usage: informal; often used in sports contexts
2. plural of doper; people who administer drugs to racehorses or other animals
Usage: informal; chiefly historical or in horse racing

Examples

• The cycling team was investigated for dopers among its members.
• Several dopers were caught using banned substances at the Olympic Games.
• The racing commission cracked down on dopers who were giving drugs to horses.
• Dopers in professional sports face serious penalties and bans.
• The documentary exposed how dopers had cheated for years without detection.