Cockadoodles

(noun): A group of people who are excessively proud and boastful, often to the point of arrogance. The term is derived from the behavior of roosters, who are known for their loud and cocky calls. Cockadoodles are characterized by their tendency to strut around and brag about their accomplishments, often at the expense of others.

"I can't stand being around those cockadoodles at the gym. They're always flexing and showing off their muscles, like they're the only ones who know how to lift weights."