1520s, "boy, fellow," originally a Scottish proper name, variant of Jack. The meaning "person who rides horses in races" first attested 1660s.
jockey (v.)
1708, "trick, outwit, gain advantage," from jockey (n.) perhaps from its former additional sense of "horse trader" (1680s). Meaning "to ride a horse in a race" is from 1767. Related: Jockeyed; jockeying.
例文
1. The jockey said he tended to flick horses with the whip.
騎手は馬に鞭を打つことが多いと言った。
2.Alexander is a famous jockey .
アレキサンダーは有名なプロ競馬騎手である。
3.The jockey rushed back from America to ride at Nottingham on Monday but went unrewarded.