The film involves four school friends who meet up again for a holiday in Australia, and stars Simon Bird, Joe Thomas, James Buckley and Blake Harrison.

While Neil and Simon visit Will at the University of Bristol, Jay emails them, claiming that he is a DJ at a popular nightclub in Sydney and lives in a mansion.

Upon arrival in Sydney, they discover that Jay works as a nightclub toilet attendant and lives in a tent at his uncle Bryan's house.

The boys prepare to drive there, but Will, angry and dejected over the Splash Planet incident and towards his friends' treatment of him, stays in Byron Bay in the hopes of starting a relationship with Katie and becoming a traveller.

Upon their return to the United Kingdom months later, Neil is in a relationship with an older female traveller from Byron Bay, while Will's mother announces her engagement to Mr Gilbert.

[4][11] Although originally intended as an unambiguous ending to the television series, the unexpected popularity and box office success of The Inbetweeners Movie led to speculation over the possibility of a sequel.

[12] Around the same time, producer Christopher Young openly recognised the possibility of another film based on the series, claiming that "if there is a sequel it will come from the creative elements ... We've talked about it.

Simon Bird, James Buckley, Blake Harrison and Joe Thomas co-produced the film with Spencer Millman but Damon Beesley and Iain Morris awarded a sole producer credit to Millman; Bird, Buckley, Harrison and Thomas are instead listed as uncredited producers in the film final cut.

[20] A second trailer, this time full length, was released on The Inbetweeners official Facebook page on 18 June, showing more of the storyline.

[25][26] Part of the film was shot in Marree, South Australia, an isolated Outback settlement without mobile reception or Internet.

[27] Bird said that the actors were initially disheartened by the absence of Palmer, and nervous about the direction of Morris and Beesley due to their lack of experience in the position.

[14] Morris had considered filming the Australian scenes in South Africa due to the comparatively high costs in Australia, which despite a higher budget caused the sequel to have fewer resources than its predecessor.

[15] When asked whether he ever felt averse to any material in the film due to perceived offence, Morris said that the crew's attitude was "let’s shoot everything, push it, and then if it feels like too much when we’re watching it, we can always pull it back in the editing room".

[30] In its opening week in Australia, the film grossed $3.155 million in Australian dollars, topping the box office and pushing Guardians of the Galaxy into second place.

The site's consensus reads: "The hapless Inbetweeners reunite for another raunchy adventure that will satisfy fans' appetite for laughs, but a downturn in plausibility along with an uptick in mean-spiritedness makes for less fun than their previous exploits.

[37] A negative review came from Graham Young of the Birmingham Mail, who found the film's humour to be repetitive: "Damon Beesley and Iain Morris have both directed this sequel which lacks an emotional arc to create momentum...Yes, it can be funny, and you’d have to be a prude not to laugh...But the endless, alliterative phrases for sex and countless in-your-face sight gags dilute the characters and turn the mood wearingly lewd.

[38] In Time Out, Tom Huddleston gave the film one star out of five, saying "‘The Inbetweeners 2’ is riddled with contempt: for its characters, for its audience and most notably for the entire female gender.

"<[29] Louise Keller of Urban Cinefile wrote a mixed review, stating that the film takes a long time to "get going" due to a "silly establishment skit".

He criticised the casting, describing the main characters as "supposed to be aged about 20 [but] played by blokes who all look as if they're 30-plus, and carry on as if they’re not yet 10", and also found the film misogynistic, saying "the derogatory manner in which women are spoken of (and often depicted) is relentlessly, callously crass.

[40] A mixed review from Philippa Hawker of the Sydney Morning Herald concluded "The Australian elements seem hastily inserted and incidental: the movie could have been set in any country that had a water park and a place to get lost.

But as a hymn to male bonding, and an exploration of the comic possibilities of what happens when a turd hits a water slide, The Inbetweeners 2 is a precisely crafted, assured piece of work".

[43] The DVD featured two audio commentaries, one with Morris and Beesley and the other by the four lead actors, in addition to a behind-the-scenes featurette, deleted scenes, and a blooper reel.

[44] The film's release on home media was sponsored by STA Travel, who offered a prize of a holiday to the Australian state of Queensland.

There is more than enough Jay in this world", and Beesley added "The end of the story has always felt like the time where they go off and start living their adult life.

[14] Various media outlets blamed The Inbetweeners 2 for an increase in a craze of deliberate defecation in swimming pools to distress other guests.