It's called The Knottie Below Me (no, it's not dirty. sorry).
You say "the knottie below me . . . " and then finish it with something, and then someone who matches that description responds "me!" and does the next one. It can be specific (the knottie below me had a beautiful baby girl at the end of April) or general (the knottie below me likes to work out).
So here we go.
The knottie below me loves the show Glee.