gomm Share definition Flag 1. A gamm, a strange type of monkey who can be seen doing strange things in trees. 2. A rubber in french (See rubber) Also see gamm omg theres a gomm in the trees being a monkey and eating a fried toad. gomm by basher July 29, 2005 0 0 Get merch Get the gomm mug. Buy Now — $32.95 See more merch