When at a buffet, when one finishes their plate, they sometimes have the kindness to wait for their fellow food pounding comrades to finish their plates as well. This begins halftime. When all are finished and ready for round 2 (or more), they all get up together and refill their plates. Gameplay resumes.
Guy #1: "Alright, I'm done of my plate."
Guy #2: "Aww man, I'm still not done of mine!"
Guy #1: "That's OK. I'll wait for you. Its halftime."
*pause until eating finishes*
Guy #1: "Alright then, are you ready?"
Guy #2: "Damn straight! Game on!"