- Acceptable Professional Targets: Estate agents!
- Escapist Character: Debbie is a normal mum who finds that what a fantasy world needs to save it isn't violent heroics or powerful magic, it just needs some serious mumming.
- Fan Community Nicknames - Yonderdarlings, taken from a tweet from Mat Baynton regarding the main cast.
- Fan-Preferred Couple - There were several ships left over from the Horrible Histories fandom that the fans were eager to see continue here. In the main, they were not disappointed. Especially when the very first episode featured Baynton and Willbond playing the Oracle and the Oracle's live-in husband.
- Ironically enough, the final trailer featured Martha kissing Mat — the one ship nobody had ever considered. It's not really romantic in context.
- Foe Yay Shipping: Some started shipping Negatus and Debbie after she pecked him on the cheek and helped him discover he was good at soccer in episode eight.
- Funny Moments: The Crone's reappearance in episode 4.
- Like You Would Really Do It: Who actually thought they'd really burn Nick the Stick up to close the portal for good? Especially since there were still three episodes left at that point?
- Nightmare Fuel - The thing with glowing purple eyes in Ennythingos and Debbie nearly being hypnotised into burning herself alive.
- Larry Rickard's "teutonic glam rocker pervert" Kendal in episode 7 for some people - including Martha Howe-Douglas (Debbie) herself.
- Periphery Demographic - As a carryover from HH, along with children and their parents, the show seems to be developing a healthy young adult fandom.
- Ugly Cute - Elf, for some. Also, Mojo.
- Uncanny Valley - some of the reactions to the puppets.
- Kendal in episode seven got this reaction from some fans. In-universe even the villains were creeped out.
- What Do You Mean, It's for Kids? and What Do You Mean, It's Not for Kids? at the same time. Some jokes and implications fly over the heads of the kiddies, and others...don't.
- The Woobie: Trevor the Blob Elder, especially in the first episode of Series Two when the other Elders gang up to try and eat him.
YMMV / Yonderland