1. characterized by excessive enthusiasm or promotion of something, often without critical evaluation; overly optimistic or promotional in a way that may lack objectivity
Usage: informal; often used critically to describe biased or uncritical support

Examples

• The boosterish tone of the local newspaper made it difficult to trust their coverage of the city council.
• His boosterish attitude toward the new product prevented him from acknowledging its obvious flaws.
• The boosterish campaign promised unrealistic benefits without addressing potential drawbacks.
• She criticized the boosterish rhetoric used by the tourism board.
• The boosterish media coverage ignored serious concerns about the development project.
• His boosterish support for the team blinded him to their poor performance this season.