10 Weirdest Anime Series Ever!

Each episode starts with a clown and his dog friend having a fun time, and then something terrible happens and suddenly they're ripping off their eyelids, slicing the sun in two, descending into a feeding frenzy where they can only be satiated by the blood of their victims. It's...not for everyone, I'll say that much. Not everyone can appreciate the genius mind behind this creation. But it's definitely a fantastic thing to convince your friend to watch and see their reaction.

Fighting nose hairs. Monkeys with ringing telephones on their heads. A talking man made out of jelly. Bobobo-bo Bo-bobo speaks to us on a spiritual level.

As if themed idol groups couldn't get any stranger, a team of actual Greco-Roman busts, sings, poses, and are carted through weird drama of the idol world in Sekko Boys.

On a perfectly normal day, a girl, Haruka, runs him over with her vespa, gives him CPR then proceeds to bash him over the head with her left-handed bass guitar. Haruka turns out to be a Galactic Space Police Brotherhood member and is in search of the Pirate King.

The son of a successful businessman gets saved from drowning by a woman who is convinced she's from Venus and lives in a strange communist riverside community, home to a man dressed as a kappa, a massive war veteran dude who is now a nun and uses guns during sermons, a guitarist wearing a star on his head, and many more beside.

On a strange island lives a community of brown poop fairies. One of these fairies, Unko-san, has the ability to give luck to others. With this power, Unko-san hopes to wipe away the metaphorical manure that plague his unlucky friends.

After accidentally ripping his ill sister's soul in half in a tug of war fight with Death, the cat Nyatta must retrieve the other half. Nyatta and his brain dead sister journey through a disturbing world of death and magic, and commit some murder along the way.

A barely animated flash short uploaded to Youtube with apparently only one voice actor and a plot they made up after several rounds of beers with no edits made whatsoever. Somehow the sheer stupity of how it presents itself makes it one of the funniest viewing experiences in anime.

Animated using the software you see amateur Hatsune Miku music videos made with, it features a bunch of fairies standing around and watching videos of awful CG people doing nothing in particular. Notable in particular for having a segment each week in which the voice actresses had to ad-lib performances and the studio would animate it afterwards, which got particularly funny when they fell out of character and accidentally called each other by their real names rather than their character names.

Gag Manga Biyori is such a bloody weird comedy that for years it presented too large of a challenge for fansubbers. The whole thing is full of so many Japanese cultural references.