cocksmith noun2 •(slang, vulgar) A man who has sex with many women.Fantasia, the guy who ran the circuit, was the biggest cocksmith in the world. He finally got arrested for molesting some chorus girl in her dressing room. — 1973 •(slang, vulgar) A man who has expert sexual technique.I was absurdly pleased, like a very apprentice cocksmith praised for the length of his stream, and to cover my embarrassment I turned the talk back to her problems. — 1992 formscocksmiths