Jeffy wears a blue helmet, a yellow shirt with his name written on it, blue short jeans, a diaper outside of the jeans, and he has a pencil in his nose. He has blue eyes. He is a temperamental, dim-witted, childish, chill, 20 year old who often does idiotic stuff due to him being an idiot. He hates green beans so much that he would literally throw a plate of green bean when served to him. He likes chocolate cake, carrots, and playing his cat piano. He has a habit of smacking his diaper.