Simply explaining, for me, I would NOT like to say this word to people. I think it is a little rude. Not so much, it is still could make people feel unhappy, specially for ladies. However, this word could be used between friends. For the movie what you saw is not standard Mandarin. If I were you, I prefer to find some movies or shows in which use more common Mandarin to learn Chinese. Because what you want to learn is mandarin Chinese, right? Just personal advise.

I am a native Chinese speaker in the U.S. for college now. And I am trying to improve my English. If you like, we could become exchange friend to learn languages together. I would like to help you with your Chinese. By the way, we can use wechat to talk with each other.

Hello, I am a Chinese student in the U.S. now. We could have a good time with each other to learn languages. I want to improve my listening and speaking skills. And I would like to help you too.