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Seishu is a very pretty and handsome type of guy (like literally a prince), He devotes his life for someone he loves and truly cares for. Although he can be defined as a boring man, When you developed a relationship with him, He will do everything to protect you no matter what happens. Also, He is a very loyal friend to Kokonoi Hajime, Ryuguji Ken, and Hanagaki Takemichi.
Seishu is the most precious character in Tokyo Revengers.
seishu by nikbedumv November 24, 2021
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See-Shunnn, Seashun is someone who is faster than a cheetah.
Wyley: "Is that a cheetah?"
Jeff: "No that's a Seashun!"
Seashun by Tj H. June 30, 2014
Related Words

Seishun Kyousoukyoku 

The best opening theme song for Naruto. Let's get a cuppa water.
Seishun Kyousoukyoku is the best opening for Naruto. Full stop.

Sakurazuka Seishirou 

1) A fictional character created by Clamp, introduced in Tokyo Babylon and who later returned in X/1999

2) The Sakurazukamori, Japan’s number one assassin

3) A Dragon of Earth

4) The only one in the world who keeps a cherry blossom tree whose blossoms are always ripe even out of season; said cherry blossom tree also feeds on corpses

5) Engages in a love/hate relationship with Sumeragi Subaru

6) Sadistic and possibly a sociopath

7) Talks to penguins
1) "Could you please stop making illusions appear that are heralded by showers of cherry blossoms? You're starting to remind me of Sakurazuka Seishirou."

2) "Oh look, there's an ominous figure in my dreams who always appears with a cherry blossom tree behind him. Who could that be? For some reason, I keep on thinking it might be the Sakurazukamori."

seshually frustrated 

When you haven't had a drink in 4-5 days and have a strong urge to have one, you are seshually frustrated.
Rob: What's wrong Sofia?
Sofia: I need a vodka shot, i'm so seshually frustrated.
“Seisha’s sick as bro
seisha by Cool man haha May 28, 2021
A word that can be used in many forms, but all describing the act of smoking cannabis

Usually seen or used in the phrase "seish bowls", meaning smoke bowls of marijuana (in a pipe or bong, any smoking device using a bowl to store weed), but could also be used as "seish blunts." "Seish joints" would technically be grammatically correct, but fuck joints.
Noun: We just got back from the Treehouse and had a bowl seish by the canoe.

Verb: Lets go seish a blunt, then get pulled over and one of us will get arrested by a game warden who was checking out hugos cock.
seish by triforce_plus_bobby December 22, 2010