A talkie is a film with sound in it — you can hear the actors speak. The word only makes sense because of history: the first films had no sound at all. People watched the picture and read the words on the screen, and a piano or an orchestra played in the cinema. Then, at the end of the 1920s, films with recorded speech arrived, and people called them talkies to mark the difference. 'The Jazz Singer' (1927) is the film usually named as the one that started it. So 'talkie' is not really the opposite of a bad film or a quiet film — it is the opposite of a 'silent film'. Because every film today has sound, nobody calls a new film a talkie. You will meet the word in two places: when people talk about film history ('the first talkies', 'when talkies came in'), and in a joking, old-fashioned way, the way someone might say 'the pictures' instead of 'the cinema'. It feels friendly and a little bit dated, not formal. There is also 'walkie-talkie', the small radio you hold in your hand and speak into — that word borrowed the same '-talkie' piece, but it is a separate word and has nothing to do with films.