Horror movies love to see how far they can go. The existence of "Blood Feast", "Cannibal Holocaust" and more recently "A Serbian Film" and the "Human Centipede" movies are living proof of this. That being said, that doesn't mean that this is a good thing. Sometimes, when you look past the desire to shock, you realize that there isn't anything actually there. It's nasty and gross, but it's also ultimately a bad movie. That's what "Lucker the Necrophagous" is, though it does sport a pretty cool title.
John Lucker (Nick Van Suyt) is a serial killer who awakes from a coma and escapes the mental hospital he's been in. 1.) How a man who has just woken up from a coma is physically capable of escaping is never explained, and 2.) I'd hate to work at a mental hospital in a horror movie, as everyone in these things is usually incompetent. Anyways, he goes on his usual spree of killing women because men are off limits in movies like this for some reason, and he also has a score to settle with the one woman who got away (Helga Vandevelde.)
"Lucker the Necrophagist" was released on video in the U.S. in a time in which German filmmakers started to make movies that pushed the boundaries of gore and sex (movies like "Nekromantik") as well as a time in which home video was making the old Grindhouse theaters and the like obsolete. You could probably find this at your local video rental (the thing went out of print pretty fast once the label went out of business), and it most likely grossed you out. On that front, it's successful-the gore is pretty remarkable for something clearly made on a nothing budget, and the thing is absolutely revolting, highlighted by Lucker having sex with a decaying, maggot ridden corpse.
Outside of the gross out factor? This has nothing. The direction is pretty amateurish, the killer at times can be more annoying than he is scary (I dare you not to hit fast forward during one of the many times in which he mumbles to himself), the score is your typical "tinny sounding electronic score" you found in awful low budget horror films of the time-I could go on and on, but it's pretty awful. Granted, other genre films of the period (and before) had shock value as their main objective. However, they could at the same time be entertaining in a trashy way ("Burial Ground") or had some actual atmosphere and scares to go along with it ("City of the Living Dead.") This has nothing going for it. It's more boring than it is disturbing.
Unless you are the kind of person who wants to see every "shocking" movie, there isn't a single reason to watch this. Just read a book or watch something else instead.