Definition of cockfish:
(n) :
A male fish, especially a salmon or trout.
(n) :
A callorhinchid fish, Callorhinchus callorynchus, native to South America.
(n) :
A cyprinid fish, Hypselobarbus dubius, native to India.
(v) :
(Internet slang, vulgar) To deceive others by using fake photos of one’s genitalia.
(n) :
(Internet slang, vulgar) A person who cockfishes.