From Wikipedia...

Exploitation film is a type of film that eschews the expense of "quality" productions in favor of making films on-the-cheap, attracting the public by exciting their more prurient interests.

Talk about your prurient interests! How about a movie called "Girls for Rent"? That's one of the 'other' titles used in marketing "I Spit on Your Corpse". That was the thing back in the day, re-cut the trailer with a new title and voice-over and re-release the movie! Now that's true Grindhouse.

Also from Wiki...

Beginning in the late 1960s and especially during the 1970s, the subject matter of grindhouse films was dominated by explicit sex, violence, bizarre or perverse plot points, and other taboo content.

And we worry about Saw or Texas Chainsaw or Hills Have Eyes. Its all been done before in one vein or another. Glad for the trip down distorted-and-hilarious memory lane!