high on something—(sl.)
1. under the influence of a drug or alcohol:
- It is far safer to drive a car when high on marihuana than when drunk.
2. keen on smth.; enthusiastic about smth.:
- “I am not high on the Thieu brand of Government,” he said, noting that 40,000 people had been executed by it.
low on something—deficient in smth.; short of smth.:
- John brewed instant coffee. He was low on sugar.