!! The Band

* BlackSheepHit: Thoroughly [[AvertedTrope averted]]. The band's biggest mainstream hits ("Birdhouse in your Soul" and "Istanbul" (from ''Music/{{Flood}}''), "Boss of Me") remain fan favorites.
* {{Defictionalization}}: [[http://www.thinkgeek.com/homeoffice/lights/e791/ Blue canary in the outlet by the light switch.]] They also sold blue nightlights as promotional material for Flood, but they didn't really look like canaries.
* FanNickname: Fans tend to capitalize "They" when the pronoun is used in reference to the band.
* HollywoodNewEngland: Both Johns are originally from outside of Boston, so they both will slip into the accent on occasion in songs. Linnell most blatantly does it in "A Self Called Nowhere" and "Wicked Little Critta."
* NamesTheSame: The band has done two different songs with the name "She Was A Hotel Detective" that have nothing to do with each other except the title and being TMBG songs. The version on the first album is "(She Was A) Hotel Detective" and the version on the ''Back To Skull'' EP is "She Was A Hotel Detective" (note the lack of parentheses). They also did a third song with a callback title, "She Was A Hotel Detective In The Future."
* NoHitWonder: Never hit the Billboard Hot 100 in the US, though they scored hits in the UK and Australia. They also didn't have a Top 40 album until ''Join Us'' in 2011, 25 years after their debut album.
* OldShame:
** They don't believe the album version of "She's Actual Size" stands up so well anymore, especially compared to the live versions they've performed since then.
** The music video for "Rabid Child," which was never shown publicly (outside of a brief clip) and the Johns won't even discuss. No one is exactly sure why, as it seemingly consists of little more than Flans lip-synching the song while standing in his apartment.
* RealLifeWritesThePlot: [[TropesAreTools An attempt to]] politely [[AvertedTrope avert]] it. As they were coming up on the end of filming the documentary ''Gigantic: A Take of Two Johns'' one of the last scenes was a show for their new album, "Mink Car", which was at 11:30pm on September 10th, 2001 in New York City. On the DVDCommentary they say they had a rough time figuring out what to do - [=9/11=] wasn't important to the story so to mention it would be "cashing in" on it, but to not mention it when it affected the lives of those present[[note]]one attendee actually stayed near the World Trade Center and was evacuated from their hotel room the next morning. They were uninjured, but they lost all their belongings from the room[[/note]] would also be rude. A compromise was made to simply have a TitleCard listing the date, letting astute viewers make the connection, but leaving [=9/11=] intentionally OutOfFocus.
* ScienceMarchesOn: Scientists used to think that the sun was a mass of incandescent gas (as in "Why Does the Sun Shine?"), but now scientists believe that it's better described as a miasma of incandescent plasma. So just to be safe, TMBG wrote another song, called "Why Does the Sun Really Shine?"
* ShrugOfGod: The band doesn't often confirm or deny theories about a given song. An example: when asked what their first single "Don't Let's Start" was about, they responded that it was "about not let's starting". In 2015 Linnell admitted he doesn't remember what he was trying to get across at the time.
* SoMyKidsCanWatch:
** Their four children's albums, ''No!'', ''Here Come The [=ABCs=]'', ''Here Come The [=123s=]'', & ''Here Comes Science'' with a fifth on the way for 2015. There's an EP that goes with the book ''Bed Bed Bed'', the title track later reworked for ''No!''.
** Subverted when the puppets made for ''Here Comes the [=ABCs=]'' and ''[=123s=]'' were used for a video of their cover of "The Long Grift" from ''Theatre/HedwigAndTheAngryInch''. The puppets have also been used for a ''very'' child-unfriendly song in a few live performances. The title? "''Puppet's Gonna Fuck You Up''".
** A couple of the songs also have this going on. The version of "Four Of Two" that you hear on ''No!'' is much more child-friendly than the original, and "Robot Parade" [[PlayingWithATrope plays with the trope]] with a HeavyMetal version called "Robot Parade (Adult Version)" that has the exact same lyrics.
* TheWikiRule: [[http://tmbw.net/wiki/Main_Page This Might Be A Wiki]]. It's been approvingly (though a bit backhandedly) [[AscendedMeme cited]] by both Flansburgh and Linnell, who referred to it in an interview as "the site that tracks all our crap".
* WhatCouldHaveBeen:
** They had a new song (Details are currently unknown) created for use in ''WesternAnimation/RecessSchoolsOut'' to play while T.J. rode his bike alone after his friends left for camp. The song was replaced with "One" by Three Dog Night for the final film.
** They Might Be Giants originally wrote an entire movie's worth of songs for the film version of ''WesternAnimation/{{Coraline}}''. Only the Other Father's Song made the final cut. The director blamed ExecutiveMeddling (although one planned song was never even written because the Johns decided [[ThrowItIn the joke song the writers came up with for the scratch track was good enough]]), and he's expressed a desire to work again with the band to do a movie based on their music. They released the song "Careful What You Pack" over a year prior to the movie's release. What originally sounded like a metaphorical song about cautiously moving on in life turned out to be a direct summary of the movie/book's underlying themes.
** [[Music/TheClash Joe Strummer]] was supposed to sing the bridge of "Cyclops Rock", but he was unavailable for some reason, so the band instead settled on Cerys Matthews, singer for Welsh indie band Catatonia because she just so happened to be in the same studio at the time.
** Music/ElvisCostello was apparently supposed to produce ''Apollo 18'' at an early stage. The Johns disapproved due to thinking they'd earn the chance to produce it themselves and to the tension that would occur from working with a hero of theirs.
** Four songs, titled "Dawn Divine", "Stalker In Reverse", "Prepare", and "Lucky You", were recorded for ''Nanobots'', but scrapped before the album's release. Little about these songs is known, except that Dawn Divine was to feature Mike Doughty. Of course, knowing TMBG, there's still a good chance they'll be released someday...

!! The Film
* HeyItsThatGuy: Aside from the obvious Mr. Scrooge playing Justin, Grandpa from Series/TheMunsters makes an appearance in the film.