A term used to denote formicative hallucinations (i.e. *tactile hallucinations mimicking bugs crawling beneath or upon the skin) occurring in the context ofamphetamine use or withdrawal. In this specific context, the pruritic lesions resulting from scratching are referred to as speed bumps or meth sores.
References
Peckham, A. (2007). Mo'Urban dictionary. Kansas City, MO: Andrews McMeel.
Dictionary of Hallucinations. J.D. Blom. 2010.