- Ascended Fanon: In Full Stream, certain names of popular Twitch streamers, plus regulars for the Jackbox Twitch streams and Discord chatroom can trigger special messages from Cookie at the start of the game.
- Defictionalization: Only briefly was this a real Game Show. It aired on ABC in 2001. Sadly, it only lasted six episodes. It was even lampshaded in one of the questions of 2011.
- Dummied Out: The first version of the iOS game. Jellyvision announced that this was done to replace it with a completely redone version.
- Some of the lines in The Ride are either really obscure or buried in the data files alive. Such as this one for the announcer:Welcome back to the show!
- Then there's the infamous Fill-In-The-Blank question featuring shadow puppet of a duck which was intact in Louder! Faster! Funnier!s Foolin Around episode, but got cut from Mock 2, since the latter was a console release. If you browse around the game's files, though, there are chances that you will see shadow puppet of a duck written in all caps.
- Some of the lines in The Ride are either really obscure or buried in the data files alive. Such as this one for the announcer:
- Follow the Leader: Received one in the early 2000's in the form of Code Head, a pair of Edutainment games that played extremely similar to YDKJ; X-Treme Culture, which taught language arts and grammar, and Calculated Risk, which taught mathematics. Both games featured Dee Bradley Baker as host and featured similar question types from YDKJ.
- Franchise Killer: The Lost Gold, at least until 2006.
- Keep Circulating the Tapes: The Webshow, which ran on Jellyvision's website from early 2007 to late 2008, is long gone (having been taken down upon the release of 2011). However, all 100 episodes have been archived and are available for download, though certain features (such as leaderboards) understandably don't work.
- In a bit of irony, 2011 (along with all of its DLC) has itself fallen victim to this, having been taken down from all digital distribution platforms due to licensing issues arising after the collapse of publisher THQ.* Unless you have one of the very few physical copies, you're flat out of luck.
- Name's the Same: Host Nate Shapiro shares a name with Nate, the intern from The Webshow.
- The Other Darrin: Quizmaster Jack was voiced by Axel Malzacher in Volume 1 in Germany, then in the other four iterations of the German localization he was voiced by Kai Taschner.
- Real-Life Relative: Jellyvision founder Harry Gottlieb voiced Nate Shapiro, the original host. His brother Tom voiced sign-in guy and eventual Ascended Extra Cookie Masterson.
- Screwed by the Network: The TV game show adaptation hosted by Paul Reubens as Troy Stevens.
- Talking to Himself: Andy Poland, the voice of Guy Towers in Sports and The Ride, Bob in HeadRush, and Old Man in various games.
- Unintentional Period Piece: Slightly. The questions are just meant to be silly and mixes pop culture and real world facts to keep them from getting too dated. But a lot of them are very much products of their decades (90s, 2000s, 2010s, etc) and whatever's popular at the time in the media. The themed one (Sports, Movies, Television) are really hit by this the most since a lot of the questions are steeped in subjects from the 60's, 70s, 80s, and 90s culture and likely anyone who played them nowadays that were born in the 2000s onward likely wouldn't get the questions.
- What Could Have Been: Before the 2001 ABC version, an attempt had been made in 1996 to bring YDKJ to TV. Not much is known about it, other than Warner Bros. produced it (via subsidiary Telepictures) in Chicago for syndication. (This was likely because developer Jellyvision was based there; it's possible that WGN-TV's then-status as an affiliate of The WB, with their superstation feed acting as a national WB affiliate. also played a role.). Game show veteran Ron Greenberg (The Big Showdown, The Challengers) was also on board (it appeared in a reel of clips from unsold pilots, as part of a celebratory video created for Greenberg's birthday at some point).
Trivia / You Don't Know Jack