Blue Meanie mushrooms, also known as Panaeolus cyanescens, are a type of psychedelic mushroom that belongs to the Panaeolus genus. They are known for their blue-staining properties and are often more potent than other psilocybin-containing mushrooms. Blue Meanies have a unique and strong visual and auditory effect, with users experiencing intense euphoria, deep introspection, and profound changes in perception. The effects can last for several hours, and users should be cautious when consuming them as they can be powerful and unpredictable.