The Mutilator

So far, it outdoes *Three on a Meathook*.

He stands supreme!

The Mutilator is a 1985 Slasher Movie.

As a child, young Ed, Jr. accidentally kills his mother while goofing around with his dad's shotgun (on the patriarch's birthday, no less). Big Ed nonverbally threatens to use the weapon on his child, who runs off.

Years later, the boy and his friends have nothing to do while on break from school, but Big Ed calls to ask his son for a favor; apparently his beach condo needs cleaning out and Ed Jr. is just the man for the job. So Ed takes his pals off to the house. When they get there, Ed's dad is nowhere to be found. Neither is his battle axe.

Uh-oh.

Tropes used in The Mutilator include:

Accidental Murder: Along with Ed shooting his mother, it's mentioned Big Ed once ran over a swimmer with a skiboat.
The Alcoholic: Big Ed.
A Minor Kidroduction
An Arm and a Leg: A police officer who inspects Big Ed's halved body gets his legs chopped off by the still-living maniac.
An Axe to Grind
Ax Crazy
Better Manhandle the Murder Weapon: After discovering his son's accidental matricide, Big Ed threatens him with the gun he used, then drags his wife's corpse into the sitting room.
Big No
Blood From the Mouth: Ralph's death.
Blood Spattered Innocents: Pam, after stabbing Big Ed.
Carpet of Virility: Ed and Ralph.
Car Fu: Big Ed's death.
Chainsaw Good: Mike gets disemboweled with an outboard motor... it's close enough to a motorized saw to count.
Chekhov's Gun: Everything that appears in the first half that could be potentially used as a weapon, is used as a weapon.
Chewing the Scenery: Mike, as he's being gutted.
Cool Shades
Coup De Grace: After hooking Sue in the groin, Big Ed chops her head off with his axe.
Covers Always Lie: There are no blond women, and no one is hung from pegs while still alive.
Creepy Basement
Cruel and Unusual Death
Curiosity Killed the Cast: The police officer gets beheaded while looking around the condo, Ralph dies looking for Mike and Linda, and Sue dies looking for him.
Daylight Horror: Ed's mother getting shot.
Death by Mocking: Ralph.
Determinator: Big Ed gets battered, has a sharp tool thrown into his head, gets knifed in the chest, and knocked around with a car, and even after being crushed in half he still manages to summon the strength to slice a man's legs off before finally expiring.
Developing Doomed Characters
Die Laughing: Big Ed.
Evil Laugh
Fade to Black: After the opening.
Fan Service: Mike and Linda skinny dipping.
Flipping the Bird: Done to Ralph, by Pam.
Freudian Excuse: Big Ed fell into an alcoholic depression after the death of his wife, and developed a deep-seated hatred of his son, which reached a boiling point by the events of the film.
Gone Swimming, Clothes Stolen: After drowning Linda and taking her out of the pool, Big Ed takes her and Mike's clothes, and leaves a trail using them.
Gorn
Great White Hunter: "Well, he likes to come down with his drinking buddies, and they swap lies about the good old days about when they were great white hunters and macho men."
Groin Attack: Sue gets a gaffing hook up the vagina, and out the stomach.
Half the Man He Used To Be: While Big Ed is clinging to the back of the car, Pam reverses it and slams him into a wall with enough force to halve him at the waist.
Hooks and Crooks
Horror Doesn't Settle for Simple Tuesday: Big Ed's wife is killed on his birthday, while the rest of the film takes place during fall break, which is presumably close to Thanksgiving Day.
Hunting the Most Dangerous Game: "Dad used to tell me that he'd hunted everything... but man."
I Have Boobs - You Must Obey!: "Well, maybe you should go and try and find them, at least make sure they're all right? And, uh, I got something to show you when you get back..."
I Just Shot Marvin in the Face: The gun cabinet is left unlocked with a child in the house, and the guns inside it are apparently all loaded.
Impromptu Tracheotomy: Ralph's death.
Improvised Weapon: After Big Ed stabs a hole through the car roof and starts strangling Ed through it, Pam burns his hand with the cigarette lighter.
Indulgent Fantasy Segue: Big Ed daydreams about strangling, shooting and slitting the throat of Young Ed.
I Need a Freaking Drink: After his wife is killed, Big Ed has a bit of gut-rot... and then shares it with the woman's corpse.
In-Series Nickname: Big Ed.
Instant Death Bullet: The mother's death.
Ironic Nursery Tune: "Happy Birthday to You".
Kneecapping: When Ed tries to stop his father from attacking Pam, Big Ed responds by stabbing him the leg.
Lingerie Scene: Sue.
Meaningful Background Event: In the car, as Pam is helping Ed make a tourniquet for his leg, you can see Big Ed get up and start moving towards them through the windshield.
Menacing Stroll
Monopoly: The bored main characters play it.
Murderer POV
My Car Hates Me
Neck Lift: Done to Young Ed (in a fantasy of Big Ed's) and Sue.
Night Swim Equals Death: Mike and Linda's deaths.
Offing the Offspring
Off with His Head: The police officer and Sue's deaths.
Once Is Not Enough
Overcrank: Used when Linda is being drowned.
Over-the-Shoulder Carry: Done with Linda's body.
Parlor Games: Blind Man's Bluff, but with alcohol.
Peek-a-Boo Corpse: Ed and Pam find Sue lying on a workbench, and when they approach, her head falls off. And upon opening a door a couple seconds later, the two discover the rest of those killed by Big Ed.
Police Are Useless: "Besides, there are no cops." Well, there's one patrolling the beach, but he is gotten rid without too much trouble.
Pool Scene
Recut
Red Shirt: The beach patrolman.
Scream Discretion Shot: Sue's death.
Self-Made Orphan: Though the matricide was accidental, while the patricide was in self-defense.
Shirtless Scene: Mike and Ralph.
Skinny Dipping: Mike and Linda.
Slashed Throat: Done to Young Ed, in a fantasy of Big Ed's.
Spikes of Doom: After killing Linda, Mike, and the officer, Big Ed sticks their heads on large spikes jutting out of the wall of his Creepy Basement.
Stealth Hi Bye: In regards to the police officer:

Ralph: "Say, how do you think he can sneak up on somebody wearing all that hardware?"
Pam: "Practice?"

Sweater Girl: Pam and Sue.
Tentative Light: At the pool.
This Is Gonna Suck: "I've got a bad feeling about this..."
Traumatic C-Section: Ed tells his friends about how his father once caught a shark and slit it open, causing a dozen or so baby sharks to come flopping out.
Trophy Room: Big Ed's is filled with animals, weapons, random stuff he's picked up, and pictures (including one of a swimmer he accidentally hit... the first sign of his instability).
Under Crank: Used when Ralph rushes out of the bedroom to look for Mike and Linda, after Pam promises him she has "something" to show him when he gets back.
Vader Breath
The Voiceless: Big Ed.
Weapon of Choice: An axe.
Why Are We Whispering?: "Why am I whispering? There's absolutely no one on this island but us."