1. ruthlessly competitive or aggressive

1. a murderer or assassin
2. a type of trout with red markings under the jaw

Examples

• The cutthroat business world demands constant innovation.
• Competition for college admissions has become increasingly cutthroat.
• The detective was hunting a dangerous cutthroat.
• We caught several cutthroat trout in the mountain stream.
• Her cutthroat tactics helped her win the election.
• The cutthroat nature of professional sports can be overwhelming.
• Cutthroat trout are native to western North America.