Definitions:

1. An individual who claims to have experst knowledge or insider information about horse racing, and offers advice or predictions about race outcomes, usually for a fee. NOUN
   • The racetrack tout claimed to have inside knowledge on the jockeys and horses, but his tips often proved unreliable.
2. An individual who offers tips or predictions on which horses or racers are likely to win at a racetrack. NOUN
   • The racetrack tout approached potential bettors, offering tips on which horse was the favorite to win the next race.
3. Someone who offers advice about betting on horses. NOUN
   • The racetrack tout was known for his questionable tips, yet many bettors still relied on his advice for picking winners.

Synonyms:

• betting advisor
• bookie's runner
• handicapper
• tipster