"The Count merely says he does not drink. Or "sup", at least. He might drink while not supping."
The word "sup" has nothing to do with drinking: it means "to partake of supper". Dracula says he does not sup to provide an excuse for why Jonathan never sees him eating: he pretends to be out all day and to have already dined before returning to the castle.
In the Dracula entry:
"The Count merely says he does not drink. Or "sup", at least. He might drink while not supping."
The word "sup" has nothing to do with drinking: it means "to partake of supper". Dracula says he does not sup to provide an excuse for why Jonathan never sees him eating: he pretends to be out all day and to have already dined before returning to the castle.