Adam Sandler plays a devious plastic surgeon who nearly loses the woman of his dreams (swimwear model Brooklyn Decker) when she discovers his old pulling prop: a fake wedding ring. To make things credible, the doc enlists his faithful assistant (Jennifer Aniston) and her kids to play his soon-to-be ex-wife and family. But while they all get to know each other on a trip to Hawaii, his dopey cousin and her oldest enemy Nicole Kidman show up to make the whole farce worse. Aniston as the romantic second choice? Just go with it.
Ever been so starved of entertainment you've tried to see how far you can push a pencil into your ear before hitting your eardrum?
Well, rest assured it's a more rewarding and much less painful way to kill two hours than putting yourself through this witless rehash of Cactus Flower, the 1969 comedy that won Goldie Hawn an Oscar.
Where that was a sparkling showcase for the timing of Walter Matthau, the class of Ingrid Bergman and Hawn's incredible potential (on debut), Just Go With It merely demonstrates Adam Sandler's limitations as an improviser and Jennifer Aniston's eye for a terrible script.
It also gives Brooklyn Decker (aka Mrs Andy Roddick) the chance to make an impression on her own debut. Not that anyone expected the Sports Illustrated cover girl to fill Hawn's comedic shoes, of course. Just her bikini. Which she does, splendidly.
But before we get to that particular bit of adolescent wish-fulfilment, let's begin with Decker's introduction as Palmer, the yummy schoolteacher who hits it off with Sandler's commitment-shy plastic surgeon Danny at a Malibu beach party.
He's immediately smitten. But when she finds the wedding ring he uses to ensure his every score is one-night stand, he tells her he is on the verge of divorce. Unconvinced, Palmer demands to meet his about-to-be ex.
In desperation, Danny enlists his 'dowdy' assistant Katherine (Aniston in spectacles and a lab coat) to play his missus. Which goes pretty well until Katherine mentions her two kids, forcing Danny to pass off the precocious little sods as his own.
The farce continues with Danny taking everyone on a trip to Hawaii - Palmer, Katherine, Katherine's odious son, and his equally irritating sister (who insists on talking in a bad Cockney accent) - plus Danny's idiot cousin Eddie (Nick Swardson), pretending to be Katherine's German boyfriend.
Just when you think things couldn't get more excruciating, along comes Nicole Kidman trying to be funny as Katherine's old college nemesis Devlin (a name Katherine's kids use as a synonym for 'poo' - hoho!).
With every scene choked with more tumbleweed than palm trees - no mean feat - the film gives up the comedy routine in favour of a Hubba-Hubba-Hula contest between the scorching Decker and forty-something rivals Aniston and Kidman (FILFs?).
In that respect, honours are even. But there's no honour, less yet amusement, in another attempt to paint Sandler as the loveable everyman while surrounding him with the usual array of mockable and clichéd characters from victims of botched plastic surgery to camp hairdressers to camp hotel receptionists to Devlin's husband (Dave Matthews) who is - get this - camp.
But it seems the world can't get enough of Sandler's brand of below-the-belt humour and feeble stereotyping. So though it gets straight in at number one on 2011's Least Amusing Hit parade, make no mistake - a hit it will be.
Anyone who unwittingly gets stuck in this spirit-sapping endurance test (sequel idea: Just Get On With It) could amuse themselves by counting how many times Sandler breaks eye contact with his female co-stars to stare at their cleavage.
Alternatively, just find a nice sharp pencil.