[shak.er] n (15c) 1: one that shakes: as a: a utensil or machine used in shaking "cocktail ~" b: one that incites, promotes, or directs action "a mover and ~"
2. cap [fr. a dance with shaking movements performed as part of worship]: a member of a millenarian sect originating in England in 1747 and practicing celibacy and an ascetic communal life -- Shaker adj -- Shak.er.ism n