Idiom
high on something
Theme: INTOXICATION - DRUGS
intoxicated with some drug.He got thrown out of the movie because he was high on something.Bill was high on marijuana and was singing loudly.
Slang
high on something
Theme: EXCITEMENT
mod. excited or enthusiastic about something.Tom is really high on the idea of going to Yellowstone this summer.I'm not high on going, but I will.