The 'Shaggy, This Isn't Weed' meme is a subgenre of Scooby-Doo memes that typically features a distorted or psychedelic image of Shaggy Rogers and Scooby-Doo. The phrase implies that the characters have accidentally consumed a more potent or different substance than expected, leading to a surreal or terrifying experience. While the original show never alluded to drug use, internet culture long ago adopted the 'stoner Shaggy' trope, and this meme serves as a dark, humorous expansion of that fan theory. It is widely used to describe situations where something innocent suddenly takes a weird, overwhelming, or completely unexpected turn.