Fire Release: Great Fireball Technique

A technique where chakra kneaded inside the body is converted into fire and expelled from the mouth either as a massive orb of roaring flame or as a continuous flame-thrower. The scope of the attack is altered by controlling the volume of chakra that is mustered. The released flames will engulf their target, and leave a crater in the ground's surface.

The Uchiha clan uses this technique as a "coming of age" rite, and as such, it is a common and favoured technique amongst them.

Trivia

 * According to Kakashi Hatake, this technique was originally created by the Uchiha clan, becoming one of their favoured moves at which they became very adept.
 * The characters for also means a "bolide", a "comet", and a "shooting star".
 * While in the manga this technique is portrayed to be unique to the Uchiha clan, the anime has portrayed it as a common Fire Release technique used by several non-Uchiha.
 * During his battle with Kakashi, Naruto, Sakura and Chiyo, Itachi was seen using the hand seals: Boar, Horse, and Tiger to create this technique.