kick-start v.

1520s, "a blow or thrust with the foot," from kick (v.). Meaning "recoil (of a gun) when fired" is from 1826. Meaning "surge or fit of pleasure" (often as kicks) is from 1941; originally "stimulation from liquor or drugs" (1844). Hence kickster "one who lives for kicks" (1963). The kick "the fashion" is from c. 1700. Kicks in slang also has meant "trousers" (1700), "shoes" (1904).

late 14c., "an involuntary movement of the body, a sudden jump," from start (v.). Meaning "act of beginning to move or act" is from 1560s. Meaning "act of beginning to build a house" is from 1946. That of "opportunity at the beginning of a career or course of action" is from 1849. Paired with finish (n.) from at least 1839. False start first attested 1850.