Foster's Home for Imaginary Friends/YMMV

Accidental Innuendo: When Mac, Bloo, and Cheese are building their go-cart, Bloo mentions about Cheese screwing everything up. How does Cheese respond? "Nuh-uh, I'm only screwing the wheel!"
Alternate Character Interpretation: This St. Elsewhere parody.
Base Breaker: Cheese
Broken Base: The show attempts at Black Comedy and/or Kafka Komedy ("Foster's goes to Europe", "I only have surprise for you", etc...) usually resulted in this.
Canon Fodder: Wilt. His Backstory wasn't revealed until the special "Good Wilt Hunting", spawning many, many Fanfics that provided their own explanation for his scars and history, often treading into Darker and Edgier territory than the actual series.
Crazy Awesome: Madame Foster. Worried you'll get in trouble for starting a party in the house? You sure will for not having her along.
- Case in point, she's left to deal with a bear. Next time we see her she's riding the bear naked!
  - That is to say, bare naked?
Creator's Pet: Cheese was this for many fans.
- Bloo started to become this for a few fans after a while.
- Ironically, the reason Cheese became a Creator's Pet is that he was immensely popular with the fans in his debut episode. You know what they say; there's such a thing as too much cheese.
- Goo was also one to an extent.
Crowning Moment of Heartwarming: Mr. Herriman. Near the end of Destination: Imagination, when he admits that he was wrong about Frankie and finally shows her some respect, even trusting her judgment in opening the box containing World. For long-time fans who are familiar with the characters, it's especially touching.
Do Wrong Right: In "Partying Is Such Sweet Soiree", Madame Foster has a prohibition on parties without her.
Ensemble Darkhorse: Cheese ("I. Like. Chocolate milk...") and Jackie Khones.
- Goo is a pretty popular character as well.
Flanderization: Bloo wasn't nearly as much of a jerk in the early seasons.
Hilarious in Hindsight: "World Wide Wabbit", which sees footage of Mr. Herriman's dancing for Madame Foster being uploaded to the internet, seems to be a spoof of YouTube Poops... until you realise that the episode premiered before YouTube even existed.
- Anything that involves the ponies/unicorns/pegasi.
  - Could that possibly be Rainbow Dash?
Magnificent Bastard: Bendy.
Memetic Mutation: Cheese is a huge source of this.
Moe: Mac is just adorable.
- And so is Goo.
- Wilt is also a huge sweetheart.
Periphery Demographic: It's a show marketed toward kids six to eleven. Most of the fans are teenagers and adults.
Tear Jerker: When you think about it: Mac's mom is always at work, we never see his dad, he's constantly tortured daily by his older brother, it's implied that he doesn't have any friends at school and is a common target for bullies, his imaginary friend is a huge jerk to him yet he's so sweet that he still visits him every day.
The Scrappy: Bendy.
Toy Ship: Mac and Goo
Villain Decay: Duchess. She was really only a villainous character in the pilot. After that, she just became snobby and apathetic to everyone around her.
The Woobie: Wilt, Frankie, and many times, Mac.
- World, the reality-changing friend inside the toy box's imaginary world in Destination Imagination, is probably the biggest woobie in the series. The majority of the events in the special happened because of his emotional instability.
  - Which only existed because he'd been locked up inside a trunk by his creator's parents for an extremely long time, where he could create absolutely anything he wanted...except other sentient beings to share it with. No wonder the little guy was an emotional timebomb.
- Also Foofy Wuggums.
- To a certain extent, Goo, at least in her debut episode. Prior to meeting Mac, she had no human friends and created imaginary friends to keep her company. It's even a bit worse in hindsight because when she tells this to Mac, she says nobody likes her because she's a "big, fat weirdo", subtly implying she might have been bullied before. There's also the possibility that her parents aren't much help because they give her too much freedom and little to no guidance.