"I'm not a person that's walkin' down the street looking mean all day"

Missy Elliot is expressing her confidence and self-assurance in this quote. She is saying that she is not someone who is continuously predicting a negative attitude or energy. She is not somebody who is walking around with a grimace on her face, or who is attempting to intimidate others. Rather, she is someone who is comfy in her own skin and who is not scared to reveal it. She is not scared to be herself and to express her real feelings. This quote is a reminder that we need to all aim to be positive and comfortable in our own skin, which we ought to not be afraid to show our true selves to the world.