"I'm really white trash"

In this quote, George Clooney is more than likely utilizing self-deprecating humor to explain himself as "white garbage." This term is typically utilized to explain someone who is from a lower socio-economic class and may have a rough or unrefined way of life. By utilizing this expression, Clooney is poking fun at his own fortunate background and acknowledging that he may not fit the stereotypical image of a wealthy and advanced star. It might also be analyzed as a way for Clooney to show that he does not take himself too seriously and has the ability to laugh at his own flaws and imperfections.