Taken from the main character of the film Wanted, who often said sorry for things he didn't need to be or things that were not his fault.
L: I'm sorry!
Jay: Don't be Wesley Gibson.
v. To snap and finally tell off the people in your workplace, school, or other parts of your daily life, in the most dramatic fashion possible. May involve screaming "SHUT THE FUCK UP!" without warning and at the top of your lungs, delivering a tirade amongst your equals, and/or smashing a back-stabbing, good-for-nothing best friend's face with an ergonomic keyboard
Friend: Wow, I bet you really let them have it, huh?
Wesley Gibson: "I understand. Junior high must have been kind of tough, but it doesn't give you the right to treat your workers like horse shit, Janice. I know we laugh at you, Janice. We all know you keep your stash of jelly donuts in the top drawer of your desk. And I want you to know that if you weren't such a bitch, we'd feel sorry for you. I do feel sorry for you. But as it stands, the way you behave... I feel I can speak for the entire office when I tell you... Go fuck yourself."