1. A central nervous system stimulant that increases energy and decreases appetite; used to treat narcolepsy and some forms of depression
   "The student illegally used pep pill to stay awake during exam week";
   - amphetamine, upper [informal], speed [informal]

Derived forms: pep pills

Type of: drug of abuse, excitant, stimulant, stimulant drug, street drug

Encyclopedia: Pep pill