An actual jockey penis was accidentally shown on TV during footage Some poor jockey at Cheltenham put a bit too much on display on TV.
A person That likes to ride a penis like it was a horse. A Dick Jockey, is one who would love more than anything to jump on a big cock and ride it, at any time.
The adjective "pin dick" (more commonly stated as "needle dick") eliminates their big dick attribute. Using the noun "jockey" (referring to horse riding jockeys.