"Let me lick you up and down 'til you stay stop."
And now for something completely different. Sometimes, it amuses me to go really old school. When this song came out, I was desperately trying to figure out what the hell this guy was talking about. I heard it on the radio recently and it suddenly dawned on me that the promise to "lick you up and down" was probably centered in a specific location (when I was younger, I imagined the guy literally licking the woman's skin from head to toe).