tipster
🇺🇸
/ˈtɪpstər/
🇬🇧
/ˈtɪpstə(r)/
A person who gives advice on which horse or team is likely to win a sports event, often for a fee.
The tipster recommended a long shot, and surprisingly, it won the race.
A person who provides information to the police about a crime.
The police were able to solve the case thanks to the tipster who provided crucial details.