| JOC | (Greek mythology) queen of Thebes who unknowingly married her own son Oedipus |
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| JOC | a support for the genitals worn by men engaging in strenuous exercise |
| JOC | a person trained to compete in sports |
| JOC | fungal infection of the groin (most common in men) |
| JOC | someone employed to ride horses in horse races |
| JOC | an operator of some vehicle or machine or apparatus |
| JOC | ride a race-horse as a professional jockey |
| JOC | defeat someone in an expectation through trickery or deceit |
| JOC | compete (for an advantage or a position) |
| JOC | a cap with a bill |
| JOC | a club to promote and regulate horse racing |
| JOC | (usually in the plural) underpants worn by men |