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Seismic Toss

A sexual act in which the male gyrates his pelvis in a rotating motion while recieving oral sex.
"Dude, last night I gave my girlfriend a seismic toss while we were listening to Prince!"
"Niiiice."
Seismic Toss by Master Machoke February 13, 2009
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

Seismic fart 

An earth shattering fart so disgustingly raunchy and ratchet that one must feel bad for the chair and/or wall that once stood, before the catastrophe occurred. In some cases the 'Seismic fart' can destroy an entire study session, leaving behind trace amounts of fallout that can last for days.
Devin: Hey Luke, what was the atomic weight for Germanium?
Luke: Oh yeah it was --
*Seismic fart rips through the air*
Luke: Never mind that, we need to search for survivors now!
Devin: agreed!
Seismic fart by lucky spice February 6, 2013

seismic rattle 

When a person motorboats another's ass cheecks vigorously. Especially used when whipped cream is involved or chocolate syrup.
Yo nigga that girl be so tight i would seismic rattle that fine ass!

seisamowsick

A feeling were like your head is heavier then your body and you cannot get up. Usually happens at 11:11 or during gym class.
SEISAMOWSICK usually happens to Lauren and/or Nichole during the following classes;
-GYM
-COMPUTERS II
-SPANISH I
seisamowsick by Lauren Nicole November 25, 2006

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.