"Runtz burger strain" refers to a variation of the Runtz strain that is a hybrid of Phat Panda's Runtz and another strain, often Donny Burger. The original Runtz is a popular hybrid from a cross between Zkittlez and Gelato. The "burger" part of the name likely comes from a lineage involving a "burger" strain, such as Donny Burger. The effects are typically relaxing and euphoric, with flavors described as sweet, fruity, and with berry and cake notes