What you say when somebody gets over-hyper and starts jabbering on and on, or uses their outdoor voice on a subject you personally think is undeserving of the effort or don't really care to hear the whole story about. Say to somebody who starts sweating profusely while talking.
Joe: "Look, I told you not to play my ps3. You always scratch the discs and never put them back in..."
You: "Calm down, James Brown. Damn. I wasn't anywhere near it."
Jenkins: "I just wanted you to come out for a beer, but no. You had to leave me hanging by myself and I got kicked out of the bar and..."
You: "Calm down, James Brown. I had my own shit to deal with."
Fred: "I can't believe this store stops selling beer at 9 pm. What are we going to do?"
You: "Brain wave! The one down on Jeff Davis Hwy sells until 11! Get in the truck and let's roll!"
Fred: "You are a genius!"
Bob: "My car stopped working, how are we going to get to the show?"
You (again!): Brain wave! My neighbor always leaves the keys in his ignition. Let's roll!"
Bob: "You are a genius!"
When, under pressure to come up with a solution, name of the girl whatshisface banged that crazy night, the actor referenced on family guy, the name of an obscure band, etc., you blank and are left stuttering.