Characters
Well, I’m the best there is. Plain and simple, when I wake up in the morning I piss excellence.
— Ricky Bobby

Behind the line May contain spoilers.
Our reading
An editorial interpretation.
Ricky Bobby boasts that he's simply the best, no debate. Then he tops it with a crude image of waking up and producing excellence like a bodily function. It's swaggering, ridiculous overconfidence, with the joke in how effortlessly he thinks greatness flows.
Context reviewed