|Business Casual Clothes - Definition of Clothing presented by Apparel Search|
Smart casual or Business casual is a potentially confusing dress code, due to its oxymoronic construction. Consider it to mean (for men) "no jeans, no ties". In the United States, nice jeans are generally accepted as smart casual provided a sport coat is also worn.
What makes you think you are so smart? Possibly it is because you are dressed so smartly.