speed freak

or speed·freak

[ speed freek ]

noun

, Slang: Disparaging and Offensive.

1. a person who habitually uses or is addicted to amphetamines, methamphetamines, or similar stimulating drugs.

Word History and Origins

Origin of speed freak¹

First recorded in 1965–70; speed ( def ) (in the sense “stimulating drug”) + freak ¹ (in the sense “person who pursues an obsession”)