A grossout/Toilet Humor-themed series of children's novels, called the Butt Trilogy in America, written by Australian author Andy Griffiths. There are three books in the series, with the first one being released in 2001 and the last coming out in 2005.
The Day My Bum Went Psychonote introduces the protagonist, Zack Freeman, a 12-year-old boy whose bum constantly detaches itself from his body and runs off, requiring him to find it. One night, he follows his bum to see what it's up too and discovers something alarming — the worlds bums (who are all sentient, autonomous beings) are hatching a nefarious scheme to overthrow humanity under the leadership of his own bum, as well as that of a gigantic, evil bum known only as the Great White Bum and his henchbums, The Prince and Maurice. To foil this plot, Zack must find and work with Silas Sterne and his daughter Eleanor, the legendary leaders of a team of "bum hunters" known as the B-Team who wear prosthetic bums and constantly battle the machinations of bumkind.
In the second book, Zombie Bums from Uranusnote , an uneasy peace between bums and humans has been achieved. Meanwhile, Zack and his bum have become close friends and bum hunters-in-training against evil bums, only to quit after an argument with one of their fellow bum hunters. However, things are complicated when Zack's parents come back from an expedition to Uranus with one of the bums that make up the planet's rings, while Zack discovers his hometown (minus his gran's house) has been destroyed by an invasion by evil bums and meets a blind bum feeler who tells him he his destined to be humanity's savior — all of which collides into a truly strange yet epic climax.
The final book, Bumageddon: The Final Pongflict note sees Zack and his bum finally become certified bum hunters, only for an entire army of giant prehistoric bums to attack and kill all the bum hunters (including Zacks family) except Zack, his bum, and Eleanor. The three soon find out that "Bumageddon" is upon them, and the only way they can stop it is by travelling back in time to the prehistoric era when bums ruled the Earth and destroying the Great White Bum when it was born. What follows is an insane series of time travel shenanigans, where Zack learns how the whole conflict between humans and bums began, Eleanor discovers her original bum, and the battle betweens bums and humanity arrives at its thrilling conclusion.
A loose Canadian Animated Adaptation of the books called The Day My Butt Went Psycho! (sharing its name with the first book's American title) was released in 2014 (nearly a decade after the books were completed). It's essentially a semi-sequel to the original book that completely ignores the second and third books, with most of the major characters from the book being present in the show (albeit altered in some ways; notably, Zacks bum is named Deuce in the series). Interestingly, this makes it the second work by Andy Griffiths to be made into a cartoon in Canada, the first being his Just! series as What's with Andy? in 2001.
Tropes that apply to this series:
- Action Girl: Eleanor
- Apologizes a Lot: Maurice
- Big Bad: The Great White Bum.
- Cool Car: The Buttmobile
- The Dragon: Often The Prince to the Great White Bum.
- Gross-Out Show: Starting from the premise which is about butts organizing a revolution and constantly pushing the envelope with toilet humor, booty mutilation, moving into vomit and mutant maggot monsters.
- HeelFace Revolving Door: The Prince and Maurice appear in all three books, surviving the encounter with the protagonists in book one, assisting them in Book 2, and turning to the Great White Bum's side in the finale, presumably because they were out of options.
- Joke of the Butt: Bums are occasionally used as a source of humour.
- Market-Based Title: "Bum" is not a widely used slang term in North America, so for the series' release over there, they were edited so that all instances of "bum" (including the title) were replaced with "butt". This unfortunately meant that a lot of puns didn't work as well in that version.
- Missing Mom: Eleanor's mother (Silas' wife) was killed by the Great White Bum many years ago.
- Staying Alive: The Kisser. He's survived a mutation, being eaten, and turning into barf, then losing an arm. Being wiped up and dropped into a volcano probably did him in.
- Toilet Humor: Naturally.
- Badass Crew: The B-Team
- The Mole: The Kisser
- Odd Organ Up Top: People's butts are planning to invoke this by taking over the world with a huge, worldwide fart by building up a massive quantity of methane gas in the "Bumcano." When the Bumcano blows, all humans will be rendered unconscious, then the bums will seize their chance and switch places with their heads.
- Take Over the World: Zack's bum's plan, sort of.
- When She Smiles: The first time Zack sees Eleanor laugh, he has to admit to himself that she looks pretty.
- Cosmic Retcon: How the series ends, everyone is living a now relatively normal life, Ned Smelly is now Ed Kelly, and the only Butts alive are Zack's and Eleanor's.
- Cycle of Revenge: After the Great White Bum kills all of his friends and family, a mix up in a time machine sends Zack back to the beginning of life. He finds the infant Great White Bum and tries to kill him, succeeding in killing his family, but the butt escapes. The Great White Bum reveals that that is why he started his quest for vengeance.
- Dropped a Bridge on Him: All the cast bar Eleanor, Zack, their bums, and Ned, are killed by a brown glob.
- Nice Job Breaking It, Hero! and Nice Job Fixing It, Villain!: The War and all of it's victims? It's all the Great White Bum's and Zack's fault, with Zack being the catalyst. See Cycle of Revenge
- Villainous Crush: The Great White Bum has a crush on Robobum.