Kate Hudson slackens her natural and decent big screen image in “My Best Friend’s Girl,” a piquant wannabe comedy, which goes all-out to be insipid, and it does succeed, and romantic, an attempt in which it “successfully” fails.

The film spends a lot of time (every single second gets on your nerves) striving to be charming, naughty and charmingly naughty. However, it leaves behind anything which might actually represent originality or genuineness, becoming a despicable waste of time.

In spite of the appealing cast list, the movie is full of cheap imitation, trying to be like the Judd Apatow-produced comedies on the one hand and copying “Juno”-like zesty dialogues on the other hand. Thus, the result is an awful, tasteless mix, despite the hundreds of ingredients used.

During the film’s first scenes, Jordan Cahan’s script doesn’t seem bad, as Tank (Dane Cook) lays bare the quintessence of male loutishness in a side-splittingly no-strings-attached style. But sooner or later the (low) standards of romantic comedy appear, making the humor go to seed abruptly.

Tank makes a living out of dating. Yes, you’ve heard me well. Numerous guys pay him for dating their ex-girlfriends and treating them so bad, that they have no other option than to come back to the men they once left. I wish these jobs were real!

This is how Tank gets to bump into Alexis (Kate Hudson). She is the object of unreciprocated obsession from her nerdish co-worker Dustin (Jason Biggs), who is none other than Tank’s best friend and roommate. When Dustin hires Tank to work his “go back to him” magic on his ex (who dumped him for saying the three words too early), the plan takes the wrong way, as Alexis, looking for some wild sex gives it a go with Tank, notwithstanding his riotously bad manners.

This is how the predictable romantic complications start off, with Tank frantically striving to keep the relationship under wraps while Dustin becomes ever more worried. Watching the show with perplexity are Alexis’ goth roommate (Lizzy Caplan) and Tank’s dad (Alec Baldwin), a college professor who bullies his female students.

Director Howard Deutch (“Pretty in Pink”) cannot liven up by any means the dead beat comedic moments, which include a completely redundant scene in which Dustin has his eyebrows shaved off and another in which Tank takes one of the babes to a holy-themed pizzeria.

Cook makes the most of his funny side when he brings to light his ironic shakiness, a feature that may ultimately serve him well in some ill-famed dramatic role. However, he creates an efficiently sinuous mutual game with Kate Hudson, allowing her to set up a smart equilibrium between comedy and desire.

The whole idea is based on the suggestion that women usually lack intelligence and Alexis is seemingly the one to understand that she has more than just two alternatives.

“My Best Friend’s Girl” is rated R (Under 17 requires accompanying parent or adult guardian) for strong language, pervasive crass humor and sexual content, including brief male nudity.