The original brand-name for methamphetamine, crank, speed, tina, or shabu in Japan, where it was invented, and other East Asian countries (Korea and China come to mind).

Methamphetamine is a drug that causes extreme rises in wakefulness (the need for sleep disappears) and well-being (the best antidepressant, aside from morphine of course). It also causes a decrease in appetite. Unfortunately, methamphetamine made in a drug lab is not of good quality, containing various leftovers from production. For this reason, the use of "dirty" methamphetamine causes rotting of teeth, losses of arms and legs, and sickness in general.

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