I'm not sure the context in which you're seeing it, but SNL is almost certainly short for Sweet 'N Little ... a mythical creature in these parts. If you ever saw the HBO? specials on the Moonlight Bunny Ranch in which they had a wonderful nympho lady named "Air Force Amy," well, SNL was/is Arkansas' sweeter, littler, superior version of Air Force Amy. Search for some of her reviews in the Independent section, and you'll read repeated stories of guys whose legs were almost too weak to escape after visits with her. Yet they returned time and time again to face the peril.