A powerful jitsu performed by Jiraya, the 4th Hokage, and Naruto. It cosists of a mass of swirling chakra which is created by controlling the spherical ball of chakra in a person's hand. Rasengan is a devastatingly powerful attack that can send a person spinning high into the sky. Naruto is awesome! WHOOOOOOOOOOOT!
Naruto: "RASENGAN"
Sakura: "Naruto you are so strong!"
Sasuke: "Hmph."
Kakashi: "' As I thought, Naruto is developing in a fast rate. I'll be expecting great things from that kid.'"
by Gangsta1011 November 09, 2006
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A technique that involves focusing chakra to the hand and making it swirl in a tight spherical shape.

Technique used by the fourth Hokage, Jiraiya, and Naruto.

Devastating power, far beyond Kakashi's chidori (lightning edge).
Naruto: "RASENGAN!"
When you're doing a girl and when you're about to ejaculate you pull out and make the hand movements then cum on your hand and swirl it. You shout RASENGAN!!! and slam it into her face while swirling and twisting it.

Just force her head through the mattress!
I gave her a hard Rasengan to the face... She wanted me to Chidori her instead
by windwaker123 November 28, 2010
WARNING. MAY CONTAIN SPOILERS. Depending on how far you are in the anime.

The Rasengan is a techinque used by Naruto Uzumaki, Jarayia the toad sage (Also known as Pervy sage), and Minato Namikaze, the fourth Hokage of the Hidden Leaf Village.

The techinque was first created by the fourth hokage, but he wasn't able to fully devolop it before his death. When Jarayia taught Naruto the move, he was able to fully devolop it, and make many more techinque varitions from it, such as the Giant Rasengan, and the Wind-Rasenshuriken.

The Rasengan is a ball of pure swirling chakra, condensed down to the perferred size, and held in ones hand. Jarayia could form it with one hand, however in Naruto's case, he still has to make a shadow clone to form the Rasengan.

Unlike the Chidori, (Lightening blade, or one thousand chirping birds) which uses massive amounts of chakra, and requires some level of Lightening style attack training, the Rasengan can be used several times in a battle, and would only require an above-average, if not basic level of chakra-control.

With devastating power, the Rasengan is also believed to be more powerful than the Chidori, it also doesn't require any hand signs, so it can be used at a moments notice. All this makes the Rasengan the ultimate weapon.

Random mofo: Its over now, kid!
Naruto: *Makes a shadow clone, and busts out the Rasengan*

Random mofo: Oh, crap! Its that kid from the leaf village! Run for your lives!

Naruto: Yeah! That'll teach you to mess with me!

And thats how I'd picture how some of his battles go.
by Skittykitty February 28, 2013
A curse word derived from the history of Naruto
A chakra technique that kills people
Don't rasengan with anyone.
That rasengan over there telling me to give me his money.
who put a rasengan up his butt.
by handle someone February 26, 2015
A lame move from a lame show(Naruto) that is overused to hell.
by TrojBCR October 07, 2007
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