Badass is defined as something or someone cool or something or someone tough, rebellious or aggressive.
When a person gets a really cool new motorcycle, it might be an example of something described as badass.
The definition of a badass is someone who is tough, mean, violent or a bit aggressive.
The outlaw Jesse James is an example of a badass.
A mean-tempered or belligerent person.
A troublemaker, esp. one who is rough, tough, mean, or, sometimes, violent.
Of or characteristic of a badass.
(US, slang) Having extreme appearance, attitude, or behavior that is considered admirable.
That tough guy looks badass.