"to convert to automatic operation," 1954, back-formation from automated (q.v.). The ancient Greek verb automatizein meant "to act of oneself, to act unadvisedly." Related: Automating.
"automatic coin-operated public laundry," 1946, originally (1942) a proprietary name by Westinghouse for a type of automatic washing machine; from laundry + ending probably suggested by automat. Earlier words for public clothes-washing places in U.S. were washateria (1935), laundrette (1945). Launderette is from 1947. The Westinghouse machine was popular after World War II and was available with coin chutes and timers.
in reference to the actions or reactions of higher animals, "a rendering automatic," by 1869, noun of action from automatize. Generally, automatization is used of animals, automation of machinery.
"capacity of automatic or spontaneous movement," 1827, from French motilité (1827), from Latin mot-, stem of movere "to move" (from PIE root *meue- "to push away").
to come on like gangbusters (c. 1940) is from popular U.S. radio crime-fighting drama "Gang Busters" (1937-57) which always opened with a cacophony of sirens, screams, pistol shots, and jarring music.
"short-barreled, large-caliber pistol," very effective at close range, 1850, for Henry Deringer (1786-1868), U.S. gunsmith who invented it in the 1840s. The prevailing misspelled form is how his name appeared on the many counterfeits and imitations.