Films - Animation
- Turning Red: According to the "Making Of" video, one of the movie title ideas was "Red and Redder".
Films - Live-Action
- About Scout: When Scout and Sam steal a car, Scout says, "We're just like Bonnie and Clyde." Sam says, "No, we're like Dumb and Dumber."
- Transformers: Rise of the Beasts: Mirage says "I like it a lot" in the same manner as Lloyd. However, this is an Anachronism Stew because the movie takes place a few months before Dumb and Dumber was released.
- Dead Rising 4: The game takes place in the mountainous town of Willamette, Colorado, and Frank can don either a tuxedo that's either bright orange or light blue with matching top hats, and their descriptions read "I'm with Stupid" and "I'm with Stupider."
- How It Should Have Ended: In "How Sonic the Hedgehog Should Have Ended", Robotnik summons an army of robots based on various characters that Jim Carrey has played over the years, including Lloyd Christmas. The latter is destroyed by Silver the Hedgehog using telekinesis to crush the Lloyd robot with the Mutt Cutts van.
- At the end of The Nostalgia Critic's very first "Commercials" video, as he goes into his "Poor Jack" soliloquy, he picks up a childhood picture of himself and bemoans his "birth control glasses, teeth that look like a chipmunk's and a Dumb & Dumber haircut that's only gotten dumb and dumber".
- Close Enough: Josh is established as a massive fan of Jim Carrey's comedies from the 90s. His favourite gag is the Most Annoying Sound in the World, which he believes sounds hilarious even outside of its original context.
