Knuckleheadz is a weed strain from the Washington breeder Exotic Genetix. Knuckleheadz is a cross of the strains Old Dirty Biker x OMFG. Knuckleheadz is a modern strain from the 2020s with extremely high THC, flavor, and a gorgeous look. Knuckleheadz is new to Leafly so leave a review about how it grows, smells, looks, tastes, and feels.