Samara Weaving is a Madonna-esque pop superstar stalked by Ray Nicholson in his father Jack’s full “Here’s JOHNNY!” nutjob mode in “Borderline,” a violent and crazed comedy about celebrity and the delusions it feeds to those who have it and those who psychotically crave to be near it.

It’s a dark subject. Ask Taylor Swift or any performer who has to keep bodyguards on duty and lawyers on retainer for restraining orders. Obsession with pretty pop starlets can be as pathetic and comical as those Tiffany fans depicted in the documentary “I Think We’re Alone Now,” or deadly dangerous. Remember the murdered singer Christina Grimmie?

Writer-director Jimmy Warden, who wrote “Cocaine Bear,” reaches for both in a darker-than-dark comedy about a brash star, the bodyguard who tries to show compassion for how she affects one fan in particular, and that one fanatic in 50 who turns out to be dangerous.

It’s more “Cocaine Bear” gonzo than subtle. But the laughs are big and bleak and sometimes bloody as one man’s deranged obsession comes to a head when he finally thinks he’s achieving his goal.

Set in the ’90s, “Borderline” follows Bell, a bodyguard who is both intimidating and certain of his threat assessment abilities. Eric Dane (“Grey’s Anatomy,” “Burlesque”) plays up the guy’s patience and compassion when he has to deal with the latest door-knock from wild-eyed Paul (Nicholson), a “problem” fan who is certain singer Sofia (Weaving) is his girlfriend.

Wearing his dad’s old suit and bringing a single rose to the door of her gated mansion (How’d he get that far?), Paul sets off a few warning bells, which Bell is sure he can unring. That gets him stabbed enough to die, but he doesn’t. And that gets Paul inside Sofia’s mansion, bubble-bathing and Tom Cruise “Risky Business” dancing until he decides to turn himself in.

It’s a good thing Sofia was on the road with her “Deranged” tour.

For some reason, she brings Bell back on the job six months later. You’d think nearly getting yourself killed and potentially exposing your client to a nut with a knife would be a firing offense. But no.

Bell clocks back in just as Sofia is finishing up her fun with her latest plaything, a star NBA point guard (Jimmy Fails) who lets her crossdress him up and take him out to her favorite clubs. But he’s just figured out that, like her passion for jigsaw puzzles, he’s useful only until she’s “figured” him out down to the last piece. He’s about to go “back in the box.”

That’s the very moment that Paul, working with a fellow mental patient (Alba Baptista) and a too-loyal lump of a friend on the outside (Patrick Cox) breaks out of the mental institution and sets in motion his murderously cunning plans to live his dream.

Weaving gives Sofia the arrogance of the rich and famous, shrugging off suggestions she’s treating this point guard as a plaything, refusing to let herself be shocked or even that afraid when intruders get into her house. Ms. “Rich is a state of mind” has the brazen bravery of someone too insolated from real world problems to believe that anything bad can happen to her.

Point guard Devonte names songs by Cyndi Lauper and Madonna as his favorites, which does more to push Sofia over the “Borderline” than any violent threat staring her in the face.

Nicholson leers and mugs and oh yeah, we see the family resemblence in Paul’s more deranged moments.

Dane plays the straight man in all this, cast to set up tough guy/hero expectations which Bell may or may not live up to.

Random bits score the biggest laughs. A cop is summoned at one point, but he (Matthew Del Bel Belluz) is so distracted and unprofessional as to make us wonder if he’s another accomplice. No, he’s just got an audition in a few hours. He runs through Fred Astaire’s “Top Hat” song and dance when he’s supposed to be watching for creeps behaving creepily.

And that petite “fellow inmate” who escapes with Paul? She’s French. And you know how they are about Celine Dion.

Like “Cocaine Bear,” “Borderline” was built with “midnight movie” appeal in mind. And even if it never quite adds up to more than that, it doesn’t disapoint.

Rating: R for graphic violence and profanity

Cast: Samara Weaving, Eric Dane, Ray Nicholson, Alba Baptista, Patrick Cox and Jimmy Fails

Credits: Scripted and directed by Jimmy Warden. A Magnet release.

Running time: 1:34