c.1440, "one who or which shakes," from shake
. Applied from 1648 (with capital initial) to various Christian sects whose devotional exercises often involved convulsions. The best-known, the American-based "Society of Believers in Christ's Second Appearing" so called from 1784; the adj. with ref. to furniture styles associated with the Shakers is recorded from 1866. Meaning "container for mixing cocktails, etc." is recorded from 1868. Phrase movers and shakers
is attested from 1874.