“He was usually surrounded by his posse, typically made up of a cluster of students that liked to be near him to absorb his brilliance.”
“In no time, an angry posse was thrown together, and the townsmen were hot on their trail.”
“This time he will be backed up by a posse of local musicians as he belts out the show tunes.”
posser
(Britain) A tool for possing, or agitating laundry in a tub. It usually takes the form of a circular plate with holes in it and a handle perpendicularly attached at the centre.
