I'm watching a show and they said "なーんだ" and the subtitles said it meant "aw", however when I look it up, it translates to "what is it." The context is these two people are talking about romantic relationships, and one person says (translated in English via subtitles) "I'm not there yet," (meaning they haven't gotten into a romantic relationship yet) in which the other person replies "なーんだ, なーんだ,"