Word Origin & History
kid (n.)
c.1200, "the young of a goat," from O.N. kið "young goat," from P.Gmc. *kiðjom (cf. Ger. kitz). Extended meaning of "child" first recorded as slang 1599, established in informal usage by 1840s. Kiddo first recorded 1896. Applied to skillful young thieves and pugilists since at least 1812. Kid stuff "something easy" is from 1923. Kid glove "a glove made of kidskin leather" is from 1687; sense of "characterized by wearing kid gloves," therefore "dainty, delicate" is from 1856.