Personalized I'm A Fungi Youth Long Sleeve T-Shirt. Youth Long Sleeve T-Shirt - White with cute smiling shiitake cartoon mushroom says I'M A FUNGI (I'M A FUN GUY"). Bad food pun, funny food pun, vegetable, mushroom lovers gift. youth long sleeve t-shirt. Shoulder-to-shoulder taping. Youth: S(6/8), M(10/12), L(14/16), XL(18/20)