VanDunking Share definition Flag 1.) When a man with a very large penis has intercourse with a woman to the point where vaginal stitches are necessary. So I guess Emily's back from the hospital. I hear she got a VanDunking. She needed 12 stitches!!! VanDunking by D-Rock City July 7, 2011 0 0 Get merch Get the VanDunking mug. Buy Now — $32.95 See more merch