Examples of this include films Sin City, and Reservoir Dogs. The videogame Max Payne would also be characterized as 'pulp noir'.
When thinking of Pulp refer to the old school adventures from the 20's and 30's heroes like Doc Savage, The Shadow and John Carter of Mars. The heroes are larger than life, the villains are dark, sinister and always evil.
Noir is a bit fuzzier on the morality. More along the lines of the Maltese Falcon where it is harder to tell the difference between the good guys and the bad guys and they will often (grudgingly) work together.
References
Categories: Film noir | Film styles