Actually, I mean that in a good way. This film is cheap, toxic and putrid in a way that Troma Productions ("Toxic Avenger", etc) can only aspire to. The film is an absolute classic of its type - it throws in almost every exploitation movie gimmick you could hope for, and serves it up in a wonderful mess that will leave you scratching your head (and checking your pubic hair for lice that may have spontaneously generated while you were watching the movie).
After a pretty repulsive start, "Raw Sewage", er, "Raw Force" quickly turns into a typical Filipino trash fest, featuring some karate-kicking meat heads who proceed to punch and kick pretty much everything and everyone else - but mostly pirates, slavers, and zombies. No movie in which pirates, slavers and zombies get kicked in the face is ever a complete waste of time. The fights (which break out seemingly ever two or three minutes) are actually fairly well done, even if the camera work and editing are lacking. The Asian guy is especially decent - he's trying too hard to channel Bruce Lee, but his moves are more "Shaw Brothers" than the rest, which makes for a welcome contrast.
Cameron Mitchell is in here, which should tell you a lot. Cameron is usually the best actor in a bad movie, but he just plain sucks in this one, which is unusual. On the other hand, the lead "hero", this Binney guy, is actually kind of cool. He can't really act either, but he's fairly relaxed and understated (in a way that reminds me of Edward Norton, of all people) and the character he plays is likable and admirable.
What else? Well, at one point the karate guys are putting on an "exhibition" for an audience on their cruise ship and one of the guys has a power lifting belt as part of his uniform. At another point, the 2nd assistant pirate/slaver points a prop carbine at the heroes and pulls the trigger and waves it around, and the Foley artist supplies the sounds of automatic weapon fire,but the prop doesn't have any blanks in it, so you get the same effect as if he were waving a toy - "B-dow! B-Dow! I got you!!" In fact, this happens TWICE.
You want more? This movie GIVES you more. The "zombies" are all painted blue, and instead of having them actually shamble or stumble or drag their feet or anything, the camera just switches to jerky slow motion whenever they are on the move. (Ooooh, spooky!!) At one point a party breaks out on the cruise ship, and it's like watching a John Waters film only with less sentimental and heartfelt emotion. (That's a joke.) After about 5 minutes of that party, I was actually eager for the pirates to come on board and kill everyone. And when the one of the pirates throws the match to ignite the gasoline they've splashed all over the cruise ship, the director superimposes a matte shot of a flaming explosion on the screen because apparently they couldn't afford the special effects for an actual explosion.
Did I mention that the main bad guy has a white suit, a Hitler mustache, a comb-over, Coke bottle-bottom glasses and speaks with a thick "Cherman" accent? That the only speaking part for the corrupt cannibalistic monks who eat the flesh of young women to raise disgraced martial artists from the dead belongs to Victor Diaz? That at one point the monks brush a half naked young woman with a giant BBQ brush covered in sauce? And that the movie ends with a piranha attack?
Trust me...if you only see one exploitation film in your lifetime, this is the one to see. It's got everything, and its cheap and sloppy and half-baked and the makers don't care who knows it.