- Adele Pichlow
- Adele Pinchelow
- Aspen, Colorado
- Atomic Peppers
- Baldy View Sanitarium
- Bernard Pinchelow
- Beth Jordan
- Bill Fagerbakke
- Bill Murray
- Billy
- Billy's Apartment
- Bob Saget
- Bobby Farrelly
- Bobby Swanson
- Brad Lockerman
- Brady Bluhm
- Brian Posehn
- Butthole
- Cal Weathers
- Cale
- Cam Neely
- Captain Lippincott
- Carl
- Carly Craig
- Characters
- Charles B. Wessler
- Charles Rocket
- Cheri Oteri
- Cindy
- Colin Ford
- Couch Fort
- Cruz Ramirez
- Dalton E. Gray
- David Chevalier
- Derek Richardson
- Detective Dale
- Dixie Dolts/Neither Rain Nor Sleet Nor Dumbness
- Doc Hudson
- Dr. Barbara Walcott
- Dr. Dilbeck
- Dr. Meldmann
- Dumb And Dumber Transcript
- Dumb Luck/Dumbells
- Dumb and Dumber
- Dumb and Dumber: The Animated Series (2014-2017)
- Dumb and Dumber (TV series)
- Dumb and Dumber 3 (TBA)
- Dumb and Dumber Three (Fan-Film)
- Dumb and Dumber To
- Dumb and Dumberer: When Harry Met Lloyd
- Dumb and dumber Wiki
- Eban Schletter
- Eddy Dunne
- El Paso, Texas
- El Paso Covention Center
- Elden Henson
- Empire of the Sun
- Eric Christian Olsen
- Erika Bierman
- Eugene Levy
- FBI
- Feltcher & Feltcher Funeral Parlour
- Fillmore
- Floyd
- Fraida's Red Ferrari 308 GTS
- Fraida Felcher
- Grant James
- Guido
- Hank Brandt
- Harry's Dog Van
- Harry's Parents Home
- Harry's adoptive father
- Harry's adoptive mother
- Harry Dunne
- Harry and Lloyd's Apartment
- Helen Swanson
- Herbert Felcher
- His Truckers
- Horse Non-Sense/Senseless in Seattle/Mmm Cheesy
- IOUS
- Ice Pick
- J.P. Shay
- Jeff Daniels
- Jennifer Lawrence
- Jessica Matthews
- Jim Carrey
- Joe Mentalino
- Josh Braaten
- Juan and Wong's Golden Dragon Cantina
- Julia Duffy
- Julie Costello
- KEN Conference
- Karen Duffy
- Karl Swanson
- Kath Soucie
- Kathleen Turner
- Kitty
- Lauren Holly
- Laurie Holden
- Lee Powell
- Lewis
- Lin Shaye
- Lloyd's cousin
- Lloyd's mother
- Lloyd Christmas
- Lloyd and Harry's apartment building
- Lloyd’s cousin
- Lucas Gregory
- Luigi
- Luis Guzmán
- Luis Posada
- Mary's Alpine Drive House
- Mary's Briefcase
- Mary's Broken Toliet
- Mary Swanson
- Massimo Lodolo
- Matt Frewer
- Maurizio Mattioli
- Michelle Krusiec
- Mike Starr
- Mimi Rogers
- Miss Heller
- Mr. Dunne
- Mr. Stainer
- Mrs. Dunne
- Mrs. Matthews
- Mrs. Neugeboren
- Mrs. Stainer
- Nicholas' Gun
- Nicholas Andre
- Otto's Best Friend
- Oxford, Maryland
- Oyster Swallow Cove
- Paul Blackthorne
- Pennsylvania State Trooper
- Penny Pinchelow
- Peter Farrelly
- Peter Stainer
- Petey
- Pinchelow Mansion
- Pino Quartullo
- Principal Collins
- Providence, Rhode Island
- Providence Hill High School
- Rachel Melvin
- Rachel Nichols
- Ramone
- Ray
- Red
- Rhode Island
- Rita Felcher
- Rob Riggle
- Robert Shaye
- Roberto Pedicini
- Sea Bass
- Sea Bass' Friend
- Sex
- Shawnie Costello
- Shia LaBeouf
- Stefano Crescentini
- Stefano Masciarelli
- Steve Tom
- Strip Weathers
- T.F. Green Airport
- Taylor St. Clair
- Teal Redmann
- Tembi Locke
- Teri Garr
- Terri
- The Apartment Building
- The Cartoon of Dumb and Dumber
- The Danbury Hotel
- The FBI
- The Pond
- Toby
- Todd Rundgren
- Tom Kenny
- Top Dumbs
- Tow Mater
- Travis Lippincott
- Troy Miller
- Turbo Laxtive
- Turk
- Victoria Rowell
- Walter Matthews
- Weenie Vanderbilt
- William Lee Scott
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