Speed
meth, chalk, ice, crystal, glass – Methamphetamine Methamphetamine is a very addictive stimulant that is closely related to amphetamine. It is long lasting and toxic to dopamine nerve terminals in the central nervous system. It is a white, odorless, bitter-tasting powder taken orally or by snorting or injecting, or a rock “crystal” that is heated and smoked.
http://www.drugabuse.gov/DrugPages/Methamphetamine.html