Hellraiser - "It's A Waste Of Good Suffering!"

Cult movies often gain their reputation for very specific reasons.  In this case, you might say this film puts the "Cult" in "Occult."

Clive Barker directs a British cast in 1987's Hellraiser.  The film brings to light some of the most disturbing visuals in a million dollar film (that's right, it was made for less than $1m) but despite the low budget, the film has earned a reputation for shock and gore that modern films could be hard pressed to surpass.