Razorback is a 1984 Australian natural horror film written by Everett De Roche and directed by Russell Mulcahy. It is based on Peter Brennan's 1981 novel. In the film, a gigantic wild boar terrorizes the Australian outback, killing and devouring people. It was released theatrically in Australia by Greater Union Film Distributors on 19 April 1984, and in the United States by Warner Bros. Pictures on 16 November 1984.

It has been called Australia's "greatest creature feature."

Jake Cullen is babysitting his grandson in the Australian outback when a massive razorback boar smashes through his house and carries off his grandson to devour. Jake is accused of murdering the child. Although people do not believe his story, he is ultimately acquitted due to lack of evidence. The event destroys his life, and he vows revenge on the boar.

Two years later, American wildlife reporter Beth Winters is in the outback documenting the hunting of Australian wildlife that is then processed into pet food at a run-down factory. She gets video footage of two thugs, Benny Baker and his brother Dicko, illegally making pet food, and the criminals chase her down in their car. They force her off the road and attempt to rape her, only to be chased off by the same boar that killed Jake's grandson. Beth attempts to hide in her car, but the boar rips off the door, drags her out and eats her. With no witnesses, people assume she fell down an abandoned mine shaft after wrecking her car, and her disappearance is ruled an accident.

Some time later, Beth's husband Carl travels to Australia in search of her and encounters Jake, whom Beth interviewed during her initial report. Jake refers Carl to the local cannery, where he meets Benny and Dicko. He pretends to be a Canadian visitor and convinces them to take him on their next kangaroo hunt. When Carl spoils a potential kill, the two abandon him. Carl is then attacked by a herd of wild pigs, spurred on by the giant boar, which chase him through the night and force him to take shelter atop a windmill. The next morning, the pigs knock over the windmill, but Carl is saved by landing in a pond, which the pigs fear entering.

Once the pigs leave, Carl attempts to make his way back to civilization, all the while suffering from dehydration-induced hallucinations. Finally, he reaches the house of Sarah Cameron, a friend of Jake who has been studying the local pig population and the only person who believes his story of the giant razorback. While recovering, Carl learns from Sarah that something has been causing the wild pigs excess stress leading them to unusual behaviour such as increased aggression and cannibalising their own young. Meanwhile, after learning that Carl had seen the razorback, Jake sets out for the pumping station and shoots the razorback with one of Sarah's tracking darts. He also finds Beth's wedding ring in the boar's faeces, which he returns to a grieving Carl.

Benny and Dicko overhear a radio conversation suggesting that Jake knows what really happened to Beth. Fearful that Jake is attempting to implicate them in her death, Benny and Dicko attack him at his camp, breaking his legs with bolt-cutters and leaving him to be killed by the razorback. His remains are later found by Sarah and Carl, along with marks in the dirt made by Dicko's cleaver. Realising that the brothers were responsible for both Beth and Jake's deaths, Carl attacks Benny at the brothers' lair, interrogating him by dangling him over a mine shaft before dropping him into it. As Sarah gets a group to hunt down the razorback, Carl corners Dicko at the cannery when the razorback suddenly appears and mauls Dicko to death. The razorback then chases Carl into the factory until Sarah arrives and is seemingly killed by the boar.

The razorback continues to pursue Carl and damages the cannery's power plant, setting the production line in motion. Carl lures the boar onto a conveyor belt that throws it into a giant meat grinder. After shutting down the machinery, Carl finds and rescues Sarah, who had merely been knocked unconscious, and the two embrace.