methamphetamine

 
Pronunciation: /ˌmɛθamˈfɛtəmiːn, -ɪn/

noun

[mass noun]
  • a synthetic drug with more rapid and lasting effects than amphetamine, used illegally as a stimulant.
    • A methyl derivative of amphetamine; chemical formula C6H5CH2CH(CH3)NH(CH3)