A new dance move that involves raising both of your hands in the air, and moving them side to side, to give the illusion that one is in fact drying their back with a towel. Variations in the word "dry" and "your" can indicate whether the act has happened, is happening, or is about to happen, and also who in fact is partaking in drying their back on the dance floor.
"Bro, get out on the dance floor and Dry Your Back."
"No thanks brah, I don't want to get all these girls wet."