Slick Belly Share definition Flag A spineless lowlife liar. A snake in the grass. When I asked Tim if he was talking shit about me to his face he said "No, I like you.". What a slick belly! Slick Belly by burtnubbins October 29, 2009 0 0 Get merch Get the Slick Belly mug. Buy Now — $32.95 See more merch