A phrase uttered by Slim Chin (played by Ken Jeong in a 2010 adidas commercial) after a day of hoops with Dwight Howard followed by a piano-side duet. Can also be used in reference to any musical and/or sensual act.
“You get his shoe, you get fast too. Then it’s sing-song time!”
“Hey girl, it’s getting late, feels like sing-song time to me.”