Well, it's not clearly specified in the movie, but some viewers speculate it could be cocaine or some other illegal substance. The ambiguity adds to the mystery of the scene.
There may not be a direct connection between'snort' (which could imply snorting drugs but is also a general verb) and 'Pulp Fiction' other than in the context of the movie's portrayal of the seedy underworld that might involve heroin use. In Pulp Fiction, there are elements of crime and drugs. Heroin is a major illegal drug, and if we consider'snort' in the drug - taking sense, it could be part of the overall drug - related activities that the movie alludes to in a very stylized and complex way.
No. Heroin is an extremely dangerous and illegal drug, and snorting it is a very harmful and illegal behavior. In the movie 'Pulp Fiction', while it has some edgy and dark content related to drugs, it doesn't promote or show actual drug use in that way. The movie is more about exploring complex characters and their interactions within a gritty underworld setting.