Kamehameha, or "Turtle Shockwave" In japanese, is another name for the energy blast created in the anime/manga Dragon Ball.
It is used throughout the whole entire series, and the 2 series, Dragon Ball Z And GT after it.

Created by Master Roshi, it took 50 years to master and Goku learned it by just watching Master Roshi perform it for the Ox King to save his village from a fire.

In order, these are the people who know how to use the Kamehameha: Master Roshi, Goku, Yamcha, Krillin, Tien,Gohan,Cell, and Gotenks (Including Trunks and Goten fused).

How to Perform: 1. Stretch arms straight out
2. Put bottom wrists together vertically with both thumbs facing the same direction (left or right doesnt matter)
3.Hold position and pull hands to the side with both palms facing the side
4.Concentrate Chi or Ki energy into the ball between your hands
5.Once the ball is of sufficient size to the user release
(IMPORTANT) You must shout Ka me ha me once all through the steps, and once your read to release face palms toward enemy and shout HA after your first line is done.
Goku used Kaioken to triple his Kamehameha attack against Vegeta in their first battle. When released Vegeta shot his Galatic Cannon and the two powers collided in an Epic explosive energy battle ending in Goku's Favor.

(Kamehameha Steps) Notice in the Kamehameha steps that there are only 5 Steps to follow. And the Kamehameha has 5 syllabus lol Ka-Me-Ha-Me-Ha
remember to stretch the syllable like Kaaa-Mee-Haaa-Mee-Haaa so you can have plenty of time to charge a full blast, or shoot out a quick one.

Master Roshi Invented the Kamehameha or "Turtle Shock Wave" to defeat his opponents and gain massive power, although now dwarfed by Goku and his friends.
by RealDefinitionGuy101 June 25, 2010
HISTORY
The Kamehameha was created by Master Roshi . He claims that it took him a total of fifty years to develop and master the move. Goku picked up the move from Master Roshi as a child. The other strange fact is that Goku learned it in under a minute whereas Master Roshi took him 100 years.

HOW TO USE:

1.) Get ready. Put yourself into a steady position. Begin gathering the energy your body produces and channel it into your hands.

2.) Stretch your arms forward, and form a shape with your hands as if you were holding a small ball.

3.) Bring your arms back, only this time, hold the 'ball' position. Bring them down to the side of your waist.

4.) Slowly say "KA-ME-HA-ME" (pronunciation:' Ka-MEH-HAA-MEH'). Say it slowly as you need to charge the wave up. You should see a small, bluish glowing energy ball in your hands.

5.) Then, throwing stretching your arms forward completely, yell out ''HA!'' at the same time. Release all your anger and rage while doing this, just as all Saiyans do. It makes the wave a lot more powerful.

EXTRA: If your Kamehameha doesn't work against your enemy, try transforming into a Super Saiyan! More about that later... ^_^

*NOTE FOR ALL* Please do not try this at home, at work, in school, in front of your kids, or towards a living life form. Your 'enemy' doesn't necessarily need to be a living thing.
First Use in the series:

Master Roshi: "Haieeee!..Ng...ng...ng...ngrah!!"

Yamcha: "I know this move! It's the master's Kamehameha !"
Bulma: "Really, you know it? How does it work?"
Yamcha: "So the master gathers all the energy in his body and shoots it out of his hands in a single energy wave! I've just never seen it in action before..."

Master Roshi: "Ka... Me... Ha... Me..."
Everyone else: "AAH!"
Master Roshi: HAAAA!!
(an entire mountain is destroyed)
Master Roshi: "Hehe. Not too bad for a 300 year-old man, say? Hm?"
(everyone but Goku has fainted)

***
by -_- /\/ / /\/ _/ /\ December 5, 2016
Literally meaning "Giant Turtle Wave", the Kamehameha is a powerful attack that takes milliseconds to charge up and hours to yell the name of.
Kaaaa- meeeeeee- haaaaaaa- meeeee- haaaaaaa!!!!!!!!!!!!!!!!!
by Kodina November 16, 2003
Kamehameha translated literally from phonetic Japanese to English means "Turtle Destruction Wave".
Kame (turtle) Hameha (destruction wave/blast)

This attack was created by Master Roshi during his material arts training. The Kamehameha wave sacrifices attack preparedness and speed in order to cause massive damage.

Variations:

Instant Kamehameha: Seen only once in the Cell Games Saga, while Goku is fighting Complete Cell, he is losing energy rapidly and pushes his remaining energy into one wave, at first it seems like he is going to destroy the planet and take Cell with him, however at the last minute he uses Instant Transmission (the technique of forming your physical body into mass a light and traveling to a location of somebody's Ki to teleport directly in front of cell, thus canceling out Kamehameha's low rate of speed, and the time it takes to build up the attack

Big Bang Kamehameha: Gogeta's take on the Kamehameha and the Big Bang Attack, derived from Goku and Vegeta receptively.

In the first season, after Goku gets back from his training with North Kai, he uses the 4x Kaioken technique to increase the power of his wave, at the point where Vegeta tries to destroy the planet using his Galick Gun (a technique similar too, and is presumably as powerful if not moreso than a Kamehameha, this is hinted at because it takes a long time to gather the energy to fire this attack).
The Kamehameha wave was created by Master Roshi, a material arts trainer from the fictional anime series Dragonball.
by kyle.biddle December 20, 2010
During sex, it's when you're about to climax, you pull out, place the heels of your hands around your penis, and shout Kame...Hame..., then all at once you shove your penis(with your hands still around it) inside of your partner, then proceed to shout HA!!! as you release your energy wave in her.
Zane knew Zoe was a huge DBZ freak so he decided to show her the good ol' Kamehameha
by Bringin88 October 19, 2010
First King of the Hawaiian Islands. Kamehameha (1740-1819) conquered all the tribes of the islands to found a dynasty that ruled there for nearly a century. The name translates in English as "The One Set Apart."
King Kamehameha passed a law protecting commoners from the brutality of chiefs that was called "the Law of the Splintered Paddle."
by cubby April 9, 2004
A school in Hawaii , located in Kapalama valley on the island of Oahu. Founded and endowed by Princess Bernice Pauahi Bishop, and named after her great-grandfather, Kamehameha I. Kamehameha school is one of the best schools in the state because of it's rigorous and challenging academic and athletic programs, and the fact that students are able to gain a better understanding of their Hawaiian culture and land. Students learn the values of respect, caring and leadership, and along the way they gain the skills needed to compete in todays society. I MUA KAMEHAMEHA
Since 1887, Kamehameha school has been guiding good and industrious men and women, and has been assisting them in reaching their goals, no matter how high.
by HAYN H1TMAN 808 July 1, 2009