1. Noun. One of the best American actors of all time. Often has roles as a bad ass, which is a role he plays better than anyone.
2. Verb. As is characteristic of many of Samuel L. Jackson movies, to yell something deep and filled with curse words to a person over and extended period of time. To constantly speak in a loud tone of voice regardless of the subject matter.
3. Verb. To speak violent things in a calm tone of voice while looking at the person with crazy eyes. This makes you scary as hell.
If you keep talking shit, motherfucker, I'm gonna Samuel L. Jackson your ass!
Person 1: Why are you yelling at me?
Samuel L. Jackson: Because this is how I talk motherfucker! Aint you seen any of my movies?