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1.
Ritual suicide by disembowelment carried out by samurai. Literally means "stomach cutting." The samurai committing seppuku would shove a dagger such as a tanto into their stomach while another samurai acted as their second by lopping off their head.
Seppuku is also reffered to as Harakiri
by Japanese_Culture July 07, 2011
 
2.
Honorable suicide commited by Samurai after they have shamed themselves or are failed their masters. Samurai could be ordered to commit suicide by their lords (Daimyo)
The samurai would disembowel himself, and when the pain got to be too much to where he might shame himself, his second would decapitate him.
by Maness October 30, 2003
 
3.
Ritual suicide by disembowelment. Some who commit seppuku have a second person decapitate them after the one who kills himself commits the disembowelment.
"After losing the battle, he felt seppuku was the only way out."
by crono June 29, 2003
 
4.
Ritual suicide by stabing them self in the stomach formerly practiced by Japanese samurai. Also called hara-kiri.
I plan to die by commiting seppuku
by Corey D. February 01, 2004
 
5.
the act of eating Japanese takeout naked in the middle of the road in order to impress friends and bestow honor to your family.
I commited Seppuku last night and my parents joined in.
I always do Seppuku every morning before work.
by SeppukuMan July 29, 2013
 
6.
Japanese word for the act of commiting suicide. Some people tend to confuse this term with hara-kiri, wich is "belly cutting".
He has commited seppuku by slicing his throat with a knife.
by Mr.X March 02, 2005
 
7.
Seppuku is the ancient art of killing yourself if you get super pissed and can’t find anybody else to kill. Ninjas use all sorts of crap to kill themselves—guns, ropes, knives, lasers, spears, etc.—and don’t even think twice about it. These guys would kill themselves for just about any reason and often for no reason at all: that’s why we there are so few ninjas today.

Step 1 Get a frisbee from the store or friend.

Step 2 Clean the Frisbee.

Step 3 Make sure your parents aren’t around

Step 4 Put something slippery on it, like butter or cream.

Step 5 Get really super pissed.

Step 6 Fold the Frisbee hard (this is crucial)

Step 7 Keep folded and insert Frisbee into mouth hard.

Step 8 Push hard until you can’t see it.

Step 9 Wait.

Step 10 Die.
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by Teej March 10, 2005