Appeal to Force: Doughy whips out his gun and a Death Glare when a pizza guy doesn't want to lose a piece of company clothing in a game of strip poker because it's against his company's rules.
Beauty Is Never Tarnished: Averted. Screw runs into a bug zapper and electrocutes herself, leaving a grid pattern burnt into her face. Barb dies from an allergic reaction to bee stings and her face becomes red and swelled up.
Catchphrase: "I'm never gonna get laid", much to Boner's everlasting regret. He does though, by a transsexual paramedic on the way to the hospital at the end.
Cat Scare: Lampshaded, as the cats in question are called "Cheap Shot", "Lame Gag" and "Dead Horse".
Chainsaw Good: The killer uses a chain saw to kill Boner, who dies of a heart attack before the killer can even use it on him.
Covers Always Lie: No, Tiffani Thiessen doesn't play the main character, nor is she the killer.
Dark Secret: All five of the main characters have some secret the killer hordes over them. Martina forgot to give her grandmother her laxatives, Boner forgot to mail a letter that would've saved his brother from the electric chair, Slab smoked his uncle's ashes, Barb ripped the tag off a mattress, and Dawson engaged in pornographic acts with a mountain man while dressed in a deer suit.
It looks like EVERY student at the school has also got one.
Dawson Casting: invoked All the actors portraying teenagers are in their mid-to-late twenties. This is lampshaded.
Disney Death: Boner dies of a heart attack... but is alive and mostly well when he's carried off by the paramedics at the end.
Dramatic Unmask: Parodied, as the villain has so many masks that the characters unmasking him eventually grow bored and the unmasking itself stops being dramatic.
Dude, She's Like, in a Coma!: This is how Boner ultimately decides to lose his virginity. He's killed before he gets a chance to rape the girl. The fact that his actual first time turns out to be with a transsexual is probably a case of Sexual Karma.
All five major characters admit that they have good reasons why they would want to kill at least one of the other four, but none of them are the killer, who is hiding out right under the table they’re convening at.
Also, for no apparent reason both Doughy and Hagatha are wearing the exact same boots as the killer, while the principal has an exact match of the killer's entire outfit just lying around.
Boner casually mentions that he could kill all his friends if he wanted to, eliciting concerned or shocked looks on their faces. Then in a spontaneously upbeat tone he says that of course he wouldn't.
Dawson is accused of having killed his entire family, and the others dumped him in the sea while he was wearing a deer costume, mistaking him for a real animal.
Evil Twin: The killer turns out to be Doughy's evil twin cousin.
Hockey Mask and Chainsaw: Played with. The killer starts out wearing a hockey mask, but this morphs into the Ghostface mask when he accidentally catches fire. Later he totes a chainsaw to kill someone.
Mattress Tag Gag: The characters are shown to have thrown a man hit by their car into the sea, but interpret threatening notes about it as being for other minor misdeeds. This ends with a girl accidentally pulling off a mattress tag in the middle of sex. With the local priest.
Meta Guy: Martina, who spouts off a list of things that one would encounter in a parody movie à la Scream (1996)'s Randy.
Multilayer Façade: When Dawson and Martina subdue the killer, they unmask him to reveal another mask. They continue for some time, accumulating a pile of masks on the floor, until they get to the last one and they (finally) find his true identity: Doughy's identical cousin Hardy.
Never Live It Down: In-Universe. Dawson was accused of murdering his entire family while he was supposedly at camp. Hagatha wrote a pop-up book about it called "Dawson Is The Killer". It doesn't help that it got rave reviews from Oprah.
New Transfer Student: Invoked with Dawson, who even gets a sign sticked to his back saying "New Kid".
Noodle Incident: Nurse Kevorkian's rant about sex and her own sexual history starts with her mentioning something that happened in a Denver bus station, and ends with her saying "and that's how I knew I wasn't a lesbian". Everything inbetween was cut by Barb's flashback.
Lampshaded. The killer gets up at the end, but Doughy kills him one more time by shooting him yet again, remarking "Not on my watch!" Even after this the killer is still alive, and runs off. According to the epilogue he settled down, and a new killer took up his guise to menace the town.
It appears that Boner dies of a heart attack, but at the end he's being wheeled away into an ambulance. He tells Martina and Dawson that he overdosed on Viagra, so even though his heart stopped the blood kept pumping.
Raging Stiffie: One of the teens appears to die of a heart attack, but it's later revealed that he'd taken an entire bottle of Viagra in anticipation of a sexual encounter, and the raging erection kept his heart pumping.
Running Gag: Every time a main character gets a note from the killer, it read "I know what you did last (insert event)". The thing is, every flashback, regardless of the date, has them coming back from a sausage festival and accidentally hitting a plastic deer with their car. They then toss it into the sea and agree to never speak about again. In Dawson's flashback, he's the one they hit, dressed like a deer, and the other four toss him into the sea.
Too Dumb to Live: Parodied and invoked. Everyone agrees that with the recent killings they should hide out at a safe place – but they all think it should be in the middle of nowhere, preferably the dark woods in the pouring rain, and without any adult supervision or police protection in the near vicinity. One even suggests that they should go to a deserted place that's been abandoned ever since a bunch of dorky kids were dismembered there.
The killer murders dozens of people in the background, including three of Hagatha's cameramen, yet no one notices or even cares. He even takes it to an absurd level by wearing scuba gear, cowboy gear, and crossing guard gear, complete with a stop sign, over his Ghostface costume.
The Administrator-Formerly-Known-As-Principal is utterly apathetic when he witnesses a satanic ritual sacrifice taking place in a teacher's lounge through one of his security cameras.
Vulgar Humor: The mountain man from Dawson's flashback dies after he farts at the fire place, causing the cabin to explode.