cliquey
/ˈkliki/Definitions
1. adjective
Characteristic of or relating to a clique, especially in a way that is perceived as excluding or intimidating others.
“She felt like her cliquey friend group was being unfair to outsiders.”
2. adjective
Exclusively concerned with a small group of people, often at the expense of others.
“The cliquey atmosphere at the party made her feel left out.”