I go with 'Pulp' for these titles.
Pulp.Gumshoe
Pulp.Copper
Pulp.Heist
Pulp.Noir
Pulp.FemmeFatale
and so forth. Jim Thompson gets his own tag :]
Off topic, but since you like the genre, have you tried any of the books from
Hard Case Crime? They have re-published some interesting and out of print titles.