after dark noun 3adjective 1prepositional phrase 1forms 1 noun3 •(Internet) An 18+ account of a content creator, typically on Twitter (X). •(Australia, slang) A bookmaker's clerk. •(Australia, slang) A shark. adjective1 •NSFW, 18+, sexual in nature. prepositional phrase1 •After nightfall; at night. formsafter darks