cliquiest
/klɪˈkiːɪst/Definitions
1. adjective
most cliquey or cliquish, characteristic of cliques or clique behavior
“The teacher warned the students against being the cliqiuest group in the school”
2. superlative form of cliquey
most cliquey or cliquish, characteristic of cliques or clique behavior
“She was considered the cliqiuest student in her class, always hanging out with the same friends”