A common phrase used by women, specifically young women, indicating that they are indeed, not fine, and you're too blind to see it.
Alice: Hey girl, you good?
Kylee: I'm fine, don't worry about me.
Alice: You sure? You don't seem okay.
Kylee: Don't worry about me! I said I'm fine!
A common phrase said by women, specifically young women, symbolizing they are indeed not fine, but do not want you to know that.
Person 1 - Hey, are you okay, you seem kinda out of it?
Girl 1 - I'm fine.
Person 1 - Are you sure?
Girl 1 - Yes! I'm fine!