Gunch Share definition Flag Gay Lunch. when two men eat lunch together and then swap blow jobs. 1. verb. I'm totally going to gunch him someday. 2. noun. So I had a really nice midday gunch with Austin today. Gunch by immaslut August 1, 2012 0 0 Get merch Get the Gunch mug. Buy Now — $32.95 See more merch