A verbal high-five from one guy to another. Generally directed at an enticing (smooth) or sexual (nice) action.
TJ: "Anything exciting happen last night?"
David: "Well at one point we crammed like ten people into a car. Naturally I had a girl on my lap because of this. She was wearing a skirt, so I got my diddle on."
TJ: "With everybody else in the car?"
David: "Hells yeah!"
TJ: "Smooth and nice"
by Beat Slice Fresh February 10, 2009
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