> {}
If I were to trust your guess from the actual context, I think I know exactly what the phrase would mean. The verb I am thinking of is more often written rather than , but that is not a rule, so here I go.
has a slang meaning of " _ **to take drugs**_ ". Thus, the sentence would mean:
> "Isn't he on some kind of drug?"
has a few important meanings that have nothing to do with " **deciding** ". Read definition #11 from which says:
> 11 **{}{}{}**
meaning:
"To drink and/or eat. To dine. Or to consume illegal drugs."