He and his posse [ˈpɒsi] met after school to catch the newly released sequel to their favorite movie.

posse [ˈpɒsi]
noun

A posse is a group of friends, or a group of people who are gathered together for a particular purpose.

Posse also refers to a group of people who were gathered together by a sheriff in the past to help search for a criminal.

Posse started out in English as part of a term from common law, posse comitatus, which in Medieval Latin translates as “power or authority of the county.” Posse comitatus referred to a group of citizens summoned by a reeve (a medieval official)

English