n. 1. A title assigned to someone who consistently displays bad ass (fearless, authentic, compassionate, ethical) behavior, even--and most especially--when no one is watching. Antonym--Anyone assigning himself/herself the title of bad ass.
I wonder if Justin Timberlake is a full-time bad ass or was just having a good day when he decided to take one of his fans to the Marine Corp Ball. I'm leaning towards full-time bad ass.