General slang term for any strain of cannabis that is sativa dominant and thus produces a strong head high versus a body stone. Headies effect the prefrontal cortex and will make you feel euphoria, uplifting, cerebral, and psychedelic. Headies are a rarity in the domestic marijuana market as they take much longer to grow. 12+ weeks of flowering, vs the 7+ weeks flowering for indica strains. Therefore headies are usually a novelty shared amongst growers as they are highly prized flowers for their unique effect on the head.