Tub of Tubbies Share definition Flag The fattest person in the world. Of all the fat people in the world, he/she is king. There goes a Tub of Tubbies, just finished off the whole $1 menu. Tub of Tubbies by unsonny January 10, 2006 0 0 Get merch Get the Tub of Tubbies mug. Buy Now — $32.95 See more merch