Sepiso 

It is a lozi languege a word to mean promise.

Sepiso ya joani:promise of john

Sepiso by Sepiso,sepa,sepile December 27, 2012

Seiso 

清楚 or せいそ
Meaning clean, tidy in Japanese.

Have been adopted by VTubers to mean Wholesome. Seems to be used ironically in many instances.

"She's a psychopath!"

"What do you mean? She's totally seiso!"

Seiso by Notayler September 12, 2020

Seiso 

A Japanese word which describes someone with a pure and clean image. This word would typically be used to portray the ideal Japanese beauty or an idol. Seiso can also imply a sense of wholesomeness.

Matsuri can be really seiso at times even though she’s a lolicon...

Nyanners is totally seiso, she is the most pure angel ever who would never ever steal your wife!

Seiso by Cruby September 14, 2020

sepinod 

An awesome person. someone who's smile will make your day amazing, no matter how bad it was. great sense of humor, amazingly talented, and smart. usually hot too. a very unique person, but deep down inside, there's a hidden crazy personality. sometimes schizophrenic.

wow, that girl i met at the party last night was amazing! definitely a sepinod.

sepinod by Herbert&Marica December 11, 2010

Seiso 

Seiso is a Japanese word that is used to describe a woman's character and appearance.

In a general sense, it means a woman who has a humble character, a clean appearance, uses beautiful words, and has beautiful posture and movements.
On the other hand, in the case of neatness used in the context of Vtuver, the meaning is slightly different.
Specifically, it adds not being lewd to its original meaning.

Seiso: When a lewd topic comes up, she doesn't like it. She skillfully changes the topic to the next one or is embarrassed.
Not Seiso: When a lewd topic comes up, she actively uses it to entertain and enliven the audience.

Seiso: She does not raise lewd topics. She will ignore or scold viewer comments when they are made on such topics.
Not Seiso: She may raise lewd topics to entertain viewers and herself.

Seiso by DeepJ January 1, 2022

semisocialize 

To attend a large gathering of people where mingling with strangers is encouraged (e.g., a party or bar) but converse only with the small handful of people one arrived with.

"Those parties are bullshit for meeting people. Everyone just shows up and semisocializes in their own little cliques."

"The guy throwing that party might be douchey, but let's go anyway. We can drink his booze and semisocialize."

semisocialize by maxkeepsitreal1 June 12, 2008

Sepiroth 

1. A Hebrew Kabalistic word, for the ten divine emanations from Ain-Soph, the impersonal, universal Principle, or deity. Since i doubt many of you know what the Kabbalah is:

Kabbalah:
"The hidden wisdom of the Hebrew Rabbis of the middle ages derived from the older secret doctrines concerning divine things and cosmogony, which were combined into a theology after the time of the captivity of the Jews in Babylon." All the works that fall under the esoteric category are termed Kabalistic.

2. The book Sepher Sephiroth analysing the kabbalah written by the infamous occultist Aleister Crowley.

3. Or more recently; the power hungry villian from final fantasy 7.

1. Keter is a sephiroth; one of the sephira.
2. What black magick weirdo freaks read... mmm ritual abuse.
3. Arch villian deserving of O fortuna themetune by that other weirdo - Wagner.

Sepiroth by Zeph May 26, 2004