"Most cliquey" refers to a group or society that is exclusive and only allows certain individuals to be a part of their inner circle. Synonyms for this term could include "insular," "clannish," "elitist," "exclusive," "selective," or "exclusionary." These all convey a sense of exclusivity and the idea that the group in question is not welcoming to outsiders or new members. Other words that could be used to describe a cliquey group might include "exclusive," "snobbish," "aloof," or "inaccessible." While these terms may seem negative, they accurately convey the social dynamics at play within such cliques or groups.