Tweakers
From Taimapedia
Tweakers are people who are on/use amphetamines often. The term comes from the urge on stimulants to open things up, or "tweak" them. Tweakers are known for their cat-like reflexes and ability to gracefully glide from tree to tree in the wild. Signs of tweakers include, sweating, gaunt looking faces, darting eye movements, and occasionally paranoia.