Dumb and Dumber is a 1994 picaresque or buddy comedy film starring Jim Carrey and Jeff Daniels. Written and directed by the Farrelly brothers, the film follows the cross-country trek of Lloyd Christmas and Harry Dunne, two good-natured but incredibly moronic friends. Making heavy use of slapstick comedy and gross-out humor, Dumb and Dumber contributed to the launch of a successful career for the Farrelly brothers.
Lloyd Christmas (Jim Carrey) is a simple-minded limousine driver in Providence, Rhode Island, who becomes infatuated with his passenger client, Mary Swanson (Lauren Holly) on her way to the airport and ultimately home to her family in Aspen, Colorado. Mary intentionally leaves a briefcase in the airport terminal for some thugs to pickup. Lloyd, not knowing it is a ransom payoff for her husband, rushes in and grabs the case thinking she has accidentally left it, but is unable to catch her in time. Harry Dunne (Jeff Daniels), Lloyd's roommate and buddy, is a part-time self-employed pet groomer who drives the "Shaggin' Wagon", a van converted into what looks like a shaggy dog. Lloyd convinces Harry to break out of their loveless lives and drive to Aspen to find Mary and return the briefcase. On their trail are two thugs, Joe "Mental" Mentalino (Mike Starr) and J. P. Shay (Karen Duffy) who both saw Lloyd grab the briefcase. Joe reveals that he has an ulcer condition for which he takes medication. Driving the "Shaggin' Wagon" Harry and Lloyd stop at a roadside diner where Harry offends a grizzled redneck named Sea Bass (Cam Neely) accidentally hitting him with a tossed salt shaker during their meal. After a confrontation Lloyd offers to buy Sea Bass and his friends a round of beers, but then trick them into paying for their meals. Down the road shortly thereafter Lloyd pees into empty beer bottles in the van for fear of a likely-pursuing Sea Bass. A motorcycle cop (Harland Williams) pulls the van over and notices the full open bottles. After pleading with the officer not to drink the contents, the officer does anyway. Realizing what he's done, he then orders the men to "get the hell out of here" right before he throws up. The mastermind of the ransom operation, Nicholas Andre (Charles Rocket), is a long time confidant of the Swanson family. Joe and J. P. stage a car breakdown after which Joe joins Harry and Lloyd with J. P. following. Joe intends to kill the two with rat poison. At another roadside restaurant, "Dante's Inferno", the three men engage in spicy food trickery in which Joe has an allergic reaction and begins to convulse on the floor. Lloyd mistakenly gives Joe the rat poison instead of his medication accidentally killing him. Later, at a gas station, Harry meets a pretty black girl, Beth Jordan (Victoria Rowell), while pumping gas. Meanwhile, Sea Bass finds Lloyd in the men's room stall. Harry sets his foot on fire and runs into the bathroom to douse the flames in the toilet, but inadvertently saves Lloyd from sexual assault by knocking Sea Bass unconscious with the stall door. Approaching the Colorado border Lloyd re-enters the interstate mistakenly driving eastbound for several hours while Harry sleeps. After a heated roadside argument Harry is seen walking back home alone. Lloyd returns riding a mini-bike having traded the van for it. The two make up and continue westward to Aspen. During a scuffle over Lloyd's extra pair of gloves the briefcase opens revealing a large amount of cash inside after which they write I.O.U.'s for the spent cash. After checking into an expensive hotel and purchasing a Lamborghini Diablo, they get full-body makeovers to attend a society function hosted by Mary arriving in candy-colored tuxedos. Harry unintentionally gets a date with her while Lloyd is left believing he is to meet her at the hotel bar. Feeling betrayed Lloyd puts laxatives in Harry's drink before he leaves which is followed by a bathroom scene with Harry and then a comic montage of their dating experience. In the climactic scene at their hotel room, Mary comes to claim the briefcase from Lloyd but is followed in by a gun-wielding Nicholas. The FBI shows up in the nick of time to save the day with Beth Jordan leading the way as a surprise undercover agent. Mary is reunited with her kidnapped husband with a heartbroken Lloyd and Harry looking on realizing for the first time that she is married. The final scene shows Lloyd and Harry on the road walking back home consoling each other when a busload of bikini-clad Hawaiian Tropic girls pulls up alongside them. They mindlessly decline an offer to join the girls on their bikini tour as "oil boys". The bus drives off and they return to arguing about the rules of a "You're It" game.