After moving his family back to his hometown to be with his friends and their kids, Lenny finds out that between old bullies, new bullies, schizo bus drivers, drunk cops on skis, and four hundred costumed party crashers sometimes crazy follows you.
After having the greatest time of his life three summers ago, Lenny (Adam Sandler), decides he wants to move his family back to his hometown and have them grow up with his gang of childhood friends and their kids. But between old bullies, new bullies, schizophrenic bus drivers, drunk cops on skis, psycho grade school girlfriends and 400 costumed party crashes he finds out that sometimes crazy follows you.—Happy Madison
This second gathering of childhood friends finds Lenny (Adam Sandler) moving his family back to the same small town where he grew up. Now, the adults (Sandler, Kevin James, Chris Rock, and David Spade) are the ones learning from their kids as the last day of school and its antics and surprises take center stage..
Another three years have passed since the events in Grown Ups (2010), and a now successful Lenny returns to his hometown of Stanton with his family, to reconnect with the old team. As the life-long friends increasingly realise that they are not getting any younger, a new set of challenges arise in the form of unforeseen reunions; familiar bullies; the possibility of a new baby, and the unstoppable threat of a raucous gang of hormone-crazed college fraternity boys. This summer, Lenny, Eric, Kurt, and Marcus will have to try twice as hard to overcome the persistent midlife crisis; however, will the boys ever grow up?—Nick Riganas
Three years after the events of the first film, Lenny Feder (Adam Sandler) (a Hollywood talent agent) has relocated his family back to his Connecticut hometown where he and his friends grew up.
In the Feder household, Lenny wakes up to find a wild deer standing next to his bed. Upon waking up, his wife Roxanne (Salma Hayek) startles the deer, causing it to urinate all over their home. The deer wreaks havoc through the house until he uses his daughter Becky's stuffed animal named Mr. Gigglesworth to lure it outside, and it eventually tears Mr. Gigglesworth apart.
Lenny takes his children Greg/17 (Jake Goldberg), Keithie/14 (Cameron Boyce), and Becky/8 (Alexys Nycole Sanchez) to their last day of school. Roxanne brings up the idea of their family having another baby, but Lenny says their family is perfect as is, upsetting Roxanne.
At the Lamonsoff household, Eric Lamonsoff (Kevin James) (who used to work at a furniture store and now runs Lamonsoff Auto Repair) and his wife Sally (Maria Bello) are at odds with each other over how to raise their children Donna/14 (Ada-Nicole Sanger) and Bean (Frank Gingerich and Morgan Gingerich). Sally believes in unwavering support while Eric prefers to be more practical with them.
At the McKenzie household, Kurt (Chris Rock) (who works as a cable-man) surprises his wife Deanne (Maya Rudolph) with a thoughtful 20th anniversary present, only to find that she has completely forgotten. Kurt knows that he a "get out of jail free" card and he plans to exploit it with a party, but Lenny's house.
Meanwhile, Marcus Higgins (David Spade) (a slacker) is waiting at a train station after receiving a letter from an old girlfriend, who tells him that he has a seventeen-year-old son Braden (Alexander Ludwig). Marcus is stunned to see a tattooed, six-foot-tall boy, who turns out to be Braden. Marcus tries to be nice and takes him to school, but Braden shows an immediate dislike toward him.
Lenny commandeers his children's school bus from Nick (Nick Swardson), the unstable driver and also the brother of Rob Hillard (Rob Schneider), and takes everyone to their last day of school. He picks up Kurt and Eric and visits K-Mart, where they are joined by Marcus, who has sent Braden to school. Malcolm (Tim Meadows) is one of Dickie's friends and an old rival of Kurt who works at K-Mart. Malcolm that Kurt's daughter wants to date his son, as he is the only African American in her grade.Kurt persuades Lenny to throw a party for the first day of summer, and the friends discuss Lenny's childhood bully, Tommy Cavanaugh (Steve Austin). Lenny claims that all his friends were scared as Eric never jumped off the suicide 35 point at the quarry either.
Lenny argues that he could take Tommy as a kid, and he can still take him. At K-Mart the group is confronted by Officer Fluzoo (Shaquille O'Neal) (who is Malcolm's brother) and officer Dante (Peter Dante) for stealing the school bus.Eventually, the friends go to see Becky's ballet recital (all the guys and the cops accompany Lenny as they wanted to leer over the hot ballet teacher who was also performing on stage), where Lenny runs into Tommy, whom Lenny is visibly terrified of. Tommy threatens that if Lenny ever lies again about being able to beat him up, he'll publicly beat Lenny up.
As school ends, Kurt's daughter Charlotte/14 (China Anne McClain) agrees to go on a date, Lenny's younger son Keith struggles with his own bully Duffy (Alex Poncio), and Charlotte and Keith's older brothers Andre/17 (Nadji Jeter) and Greg accompany Braden to an abandoned quarry, where they join a college party.
After humiliating their old rival Dickie at the Ice Cream House, Lenny, Eric, Kurt, and Marcus visit the same quarry, where they swam during their youth. There, they are confronted by a hostile college fraternity led by Milo (Milo Ventimiglia) and Andy (Taylor Lautner), who force them to jump in naked from the highest point.Braden who was partying with the frat boys, witnesses this and goes off to vandalize their frat house. Finding their fraternity house vandalized, the frat boys blame Lenny and his friends and swear revenge. Later, the friends take Marcus' van, vandalized by Braden, to Eric's auto body shop, and Marcus inadvertently rolls through town in a giant runaway construction tire.
Lenny learns that Keith is a gifted football kicker, but accidentally breaks his son's leg. Eric apologizes to Sally for avoiding her to spend time with his mother. Lenny becomes suspicious of Kyle's (Oliver Hudson) (a gay yoga teacher at Squats Fitness) relationship with Roxanne, who is angered by her employee Penny's (Cheri Oteri) (Roxanne runs a boutique) lifelong obsession with Lenny. Marcus bonds with Braden, Charlotte goes on her date, Andre passes his driving test overseen by Wiley (Steve Buscemi), and Greg succeeds in asking out Nancy Arbuckle (Halston Sage), a girl he has a crush on.
Lenny arrives home to help Roxanne set up for a 1980s-themed party for their friends. As all of their friends begin to arrive, Roxanne urges Lenny to consider having another baby. Lenny continues to protest the idea and is left dumbfounded when Roxanne reveals that she is pregnant. Lenny realizes she is not having an affair with Kyle, who has repaired Becky's stuffed animal. Lenny, feeling overwhelmed by this discovery, goes off to drink with his friends.
The Feder's party goes well most of the night until Tommy Cavanaugh shows up and disrespects Lenny in front of everyone, so Lenny challenges Tommy to a fight. In a surprising turn, Tommy decides to take a dive so that Lenny can look tough for his kids, and the two develop a mutual respect.
Soon after, the angry frat boys arrive at the house looking for retribution for the damage to their frat house. They go on to insult the local town residents, inciting a fight. The locals hold their own against the frat boys and eventually send them running away defeated. The party-goers eventually defeat the fraternity, with Andy getting attacked by the deer, thanks to Becky's tactic with her stuffed animal.
After all the commotion dies down, the four friends have pancakes at Eric's mom's house. Eric's mother, Mrs. Lamonsoff reassures Lenny that a new baby is a wonderful thing and eventually he will never be able to imagine life with just three kids. Lenny has a change of heart and returns home, telling Roxanne he is sorry and excited about the new baby, and they reconcile.