I'm trying to find an old movie probably from the 70s or early 80s. ?

I think the name of it is either lust for blood or blood lust. It's about a man whose mother is a cannibal and he traps and kills three young girls for meat for her. If anyone can remember seeing this movie I would appreciate it if you could tell me if I have the name right. I'm quite a horror buff and it has some of the best effects I think I've seen at that time. Thanks for any help I can get