The definition of a badass.
I am going to nutshell it for you, and follow with several ways to identify a badass.
IN A NUTSHELL: A badass is someone who lives through her heart. She is open, compassionate, curious, and calm. A badass is someone who stays centered in stressful situations because she knows that it is the place from which she operates best.
Sound challenging? It is. If it wasn't, everybody would be doing it.