Snuffy

This may mean soiled with grains of snuff or (colloquially) irritable and cross (75). It may also mean tipsy (115). In the context I should vote for the first interpretation. If he is dry can he also be tipsy? In the next line he is called ill-tempered, so irritable and cross would be wasted.

Context: 
He’s dry and snuffy
Opera: 
Act: 
Act II