phat horsecock Share definition Flag when a certain someone has the biggest, most massive piece of meat between their legs. OH. MY. GOD. Do you see him? He has a phat horsecock! You can see it through his jeans!! phat horsecock by TheScarpinator November 11, 2020 0 0 Get merch Get the phat horsecock mug. Buy Now — $32.95 See more merch