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.