Trama

Childhood friends Norbit Albert Rice (Eddie Murphy) and Kate Thomas (Thandie Newton), living at an orphanage doubling as a Chinese restaurant called The Golden Wonton owned by Mr. Wong, are separated when Kate is adopted. They also play married each other with Ring Pops and lived happily ever after for two weeks until Kate's adoption.

Five years later, Norbit is rescued from playground bullies by a tough, overweight girl Rasputia Latimore (Eddie Murphy), who becomes his protector from the other bullies and best friend, but eventually grows into an arrogant and tyrannical woman. They marry each other as adults (and Rasputia starts sexually assaulting Norbit), but Rasputia begins insulting and controlling him, especially accusing him for adjusting her car seat when she is driving her car. Norbit is also belittled by Rasputia's three older brothers Big Black Jack (Terry Crews), Blue (Lester "Rasta" Speight), and Earl (Clifton Powell), working as a bookkeeper at their construction company. The Latimore brothers run a "security business" (taking protection money from all local businesses in the community), instilling fear in the entire community except Mr. Wong, who refuses to sell them his business.

Norbit catches Rasputia cheating on him with her tap dance instructor Buster Perkin (Marlon Wayans) (Buster was having sex with Rasputina as she offered to have her brothers fund his tap dance classes videotaped and distributed internationally) and calls her the 'Queen of Whores' which results her into chasing him through the neighborhood. After the chase, Norbit throws away his wedding ring and vents his anger about Rasputia's infidelity at a puppet show for the orphans. He is stunned to see Kate for the first time since childhood, and his affection for her reignites as he learns she is buying Mr. Wong's orphanage but is disappointed to learn she is engaged to a man named Deion Hughes (Cuba Gooding Jr.).

With help from ex-pimp friends Pope Sweet Jesus (Eddie Griffin) and Lord Have Mercy (Katt Williams) and other townspeople, Norbit meets Kate without Rasputia's knowledge and along the way, Kate teaches Norbit how to ride a bike. Deion attempts to leave town without Kate, having no intention to help her run the orphanage, but the Latimore brothers persuade him to help them to turn the orphanage into a strip club instead (once he is married to Kate, he will have equal rights to the orphanage, as Kate). Deion proposes to Kate and the wedding is set for the coming Saturday.

The brothers know that the liquor license on the orphanage wont roll over when the property changes hands and a new license could take many yrs. So, they enlist Deion to get Kate to sign the license transfer document. But Deion knows that this will raise too many suspicions as Kate plans to close the restaurant.

The brothers dupe Norbit into getting Kate to sign papers to renew the restaurant's liquor license in the Latimores' name. Norbit's meeting with Kate (where Kate gets really drunk and doesn't look at the documents before signing them) leads to helping rehearse her wedding, where a kiss between them makes her reconsider marrying Deion. Norbit returns home to learn Rasputia witnessed their kiss and threatens violence towards Kate if he ever sees her again.

When Kate later learns about the deal (that the liquor license is being renewed and that too in the Latimore's name) from Deion, she goes to confront Norbit and sees him being held prisoner by Rasputia (who masterminded the orphanage plot) in their basement. Norbit reluctantly, deliberately drives her away to protect her from Rasputia. Satisfied, Rasputia lies that Norbit has tricked Kate since she came back to town. Heartbroken, Kate runs away, and Norbit decides to permanently leave town. Then he finds a letter from the private investigator he hired, discovering Deion is rich from various divorce settlements.

The Latimores reveal their plan to Norbit and lock him in the basement again. Norbit escapes by bike, reaching the wedding just in time to inform Kate of Deion's schemes. Though his proof of Deion's divorce settlements was destroyed after falling into a pond, Norbit reveals Deion's ex-wives and children, and Deion flees as they give chase, which results in the Latimores' plan being blown up in their faces.

The Latimores attack Norbit for permanently ruining their plans, but the townspeople take up arms to protect him. Rasputia fights her way through the crowd and prepares to kill him, but Mr. Wong harpoons her in the rear. The Latimores finally accept defeat and are chased out of town while Norbit and Kate reconcile. They buy the orphanage and marry under the same tree where they played as children years ago and finally live happily ever after. Rasputia and the Latimores were never seen or heard from again, but several rumors said that they move to Mexico and open up their strip club "El Nipplopolis", where Rasputia becomes their most popular and lucrative stripper.