jock-strap

n close-fitting undergarment worn by sportsmen to support or protect the genitals （男运动员用的）下体护身, 护裆.

jinnee, jinx, jitter, jitterbug, jittery, jive, Jnr (also Jr, Jun), Job, job creation, job description, job lot, job satisfaction, job sharing, Job's comforter, jobber, jobbery, jobbing, jobcentre, jobless, joblessness, jockey, jocose, jocosely, jocosity, jocular, jocularity, jocularly, jocund, jocundity, jodhpurs, jog, jogger, jogging, joggle, jogtrot, Johannes Brahms, john, John Bull, John Foster Dulles, John Major,