Sei

To be incredibly epic at basically everything. Seems to be from a different dimension, though this is up for debate. Will not admit to having ninja skills even though said skills are witnessed regularly. Prone to anime-type reactions (aka loud and obvious), usually ending in some form of destruction.

Person 1: WTF happened in here!? All the desks and chairs are destroyed!!
Person 2: Someone pissed off (insert random name here).
Person: What an idiot, everyone knows (insert random name again) is a Sei.

by Kiri :D June 21, 2010

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Sei

Sei can be used as a term for smart, funny, and helpful person but mainly used for referring to a very good friend. Commonly used on discord while talking on servers or in dm's. It can also mean when someones a Sei that theyre hobby is engineering, they are an engineer or was previously.

-Poz, aka tall_fellow/Sundrop was here

"Your such a Sei!"

by tall_fellow aka Poz January 25, 2022

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Sei

Sei is pure and untainted, yet knowledgeable in the vast world of sexual deviancy. He needs to be likened to a donut when talked to. He needs to be talked to gently and sweetly, otherwise he will become rigid with fear. He needs to feel validated with gentle words of encouragement. He would appreciate sprinkles on top of him. He is a endless bottom and a brat, that will relentlessly tease you unknowingly because he's too innocent to know any better.

"Sei looked up with eyes glazed over, just like the donut that he is, confused and scared of the sexual advances of women who found him too cute to be true and couldn't resist googling over him." "Look at this lil soft harmless Sei!" "That Sei just wants to sit on your lap and be petted until he falls asleep."

by IsItSo February 5, 2022

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sei

a girl that you can never compare to being a whale in genshin impact because shes practically the whole sea of tevyat whenever a new character releases she'll practically buy the entire shop of genesis crystals and then pull for the character and their signature weapon, sei is also very nice and cool and also very good at games

person one : sei is so cool!!
person two: shes the whole sea of teyvat!!!

by shenheslover December 8, 2021

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Seyed

A person who has high standards, loves their hair, and could possibly be a terrorist.

Girl 1: OMG i can't believe that he didn't call me back!

Girl 2: it's okay, he's a Seyed and you probably didn't meet his high standards.
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Guy 1: Dude im scared for yelling that him.

Guy 2: Why?

Guy 1: Dude he's totally a Seyed and probably put a bomb on my car!

by Shedevil123 March 9, 2010

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