A really funny 'Harry Potter humor fanfic' idea could be that Peeves the poltergeist teams up with the Marauders' Map. Peeves uses the map to find the most inconvenient times to play pranks on the teachers. He might show up in Snape's classroom just as he's about to start a very serious potion - making lecture and turn all the cauldrons into giant jack - o - lanterns.
One example could be a fanfic where the Weasley twins play an even more elaborate prank on Umbridge. They might transform her office into a giant Quidditch pitch, complete with flying bludgers that chase her around. Another is a story where Neville accidentally makes a potion that causes everyone's hair to turn into the shape of their Patronus. It's hilarious as Hermione has a book-shaped hair and Ron has a hair that looks like a piece of bacon.
One example could be a crossover with 'The Lord of the Rings' where Harry Potter and Frodo have a comical encounter. Maybe Harry accidentally casts a spell that makes Frodo's ring float away and they both scramble to get it back in a very clumsy and funny way.
One interesting example could be a fanfiction where Harry and Hermione are secretly in love and they have humorous banter during their study sessions in the library. Another might be a story where Ron tries to use his own brand of humor to win over Luna Lovegood romantically.
One interesting example could be a fanfic that turns the sorting hat into a meme - making it give really sassy and modern - day comments during the sorting ceremony. Another could be a fanfic where the Weasley twins create meme - worthy magical pranks that spread throughout Hogwarts like wildfire.
In some fanfics, an order summons might be a magical charm that appears as a constellation in the sky, visible only to those who are part of the 'Order'. For instance, if the Order is reforming to fight a resurrected Voldemort - related threat, the summons could call wizards from all over the wizarding world to a hidden location like the Room of Requirement.
In some fanfictions, the Weasley twins' pranks are described in a really humorous way. For example, when they turn Filch's office into a magical menagerie full of strange and comical creatures that keep him running around in circles trying to catch them. It's a great display of the typical Harry Potter humor with its touch of magic and mischief.
One interesting 'Harry Humor Fanfic' could be about Harry accidentally turning his hair into rainbow colors during a spell gone wrong. It would be a hilarious take on his magical mishaps.
There are fanfictions that humorously depict Hagrid's attempts at teaching Care of Magical Creatures. In some, he accidentally lets loose a group of Flobberworms that start acting like they're on a mission to take over the school. They slither into the classrooms and start eating students' homework, which creates a really comical situation as everyone tries to catch them.
One common example is his joking about the Hogwarts houses. He might tease Ron about Gryffindor's bravado or Hermione about Ravenclaw's love for books. Another is when he mocks the Ministry of Magic's bureaucracy in fan - created stories. For instance, making fun of the long forms they have to fill out for simple magical tasks.
One example could be a fanfic where Draco Malfoy constantly makes sarcastic remarks about Hogwarts' new rules. For instance, when they introduce a new dress code, he might say, 'Oh, because a different shade of robes will surely improve our spell - casting.' Another could be a story where Hermione uses her sarcasm to deal with Ron's silly ideas. Like when Ron suggests they use a spell he just made up to solve a problem, Hermione might reply, 'Yes, because your half - baked spells have always worked so well in the past.'
One example could be fanfics where Harry is tortured by dark wizards in a way that explores his inner strength and how he copes. Another might be those where he endures mental torture due to false accusations within Hogwarts. However, these can be quite dark and disturbing.