also stickup, 1857, "a stand-up collar," from verbal phrase (attested from early 15c.), from stick (v.) + up (adv.). The verbal phrase in the sense of "rob someone at gunpoint" is from 1846, hence the noun in this sense (1887). Stick up for "defend" is attested from 1823.[stick-up etymology, stick-up origin, 英语词源]