OG Chem, also known as "Chemdog OG," "Chem OG," and "Chemdawg OG" is a sativa-dominant marijuana strain crossed between two legendary strains: Chemdawg and OG Kush. The diesel notes of Chemdawg combine with the sour, piney scent of OG Kush to create a pungent skunky aroma that fills the room.