The song "Smooth Jazz Is Bumpin'" by Paul Hardcastle celebrates the smooth and relaxing sounds of jazz music. The lyrics describe how the music can uplift people and make their day better, no matter where they are or what they're doing. Hardcastle emphasizes the different instruments that make jazz music unique, such as the saxophone and mellow guitar. The song also highlights how smooth jazz is versatile, as it's perfect for listening to in the car or on the beach. Hardcastle describes how the music is like a glass of mellow wine, helping listeners to feel fine. He encourages people to stay in tune with the sound and reminds them that smooth jazz will always be around. Overall, "Smooth Jazz Is Bumpin'" is a tribute to the timeless and calming nature of jazz music. It's a celebration of the genre's ability to provide a moment of tranquility in our busy lives.