The only drug it's socially acceptable to be completely addicted to.
"Don't do drugs, kids" said the teacher as she sipped on her extra-large coffee, consuming 200 mg of caffeine in the process.
adj. Describes an alcoholic beverage that serves to keep one's level of intoxication roughly constant.
A couple of hours after getting buzzed, Fred decided that another beer would be isoalcoholic, and without one he would swiftly descend back into sobriety.
