From Dragon Ball Encyclopedia, the ''Dragon Ball'' wiki
Directory: Techniques → Offensive techniques → Ki → Energy waves
The Fire Breath (火 息, Hi Iki) is an energy wave attack used by many fighters.
The user fires an immense, blazing flame from their mouth that severely burns their target, causing destructive effects to any area also caught in the flame.
Dragon Ball GT
Hirudegarn used this attack in his fight against Vegeta in his Super Saiyan 2 form in Dragon Ball Z: Wrath of the Dragon. Hirudegarn fired his Fire Breath at Super Saiyan 2 Vegeta he had thrown him into a building. Super Saiyan 2 Vegeta used an energy shield to protect the civilians in the building, but he was affected by the attack and knocked out.
It is named Gigantic Flame in the Budokai Tenkaichi video game series and is Hirudegarn's Ultimate Blast and one of Great Ape Baby's Blast 2 attacks.
It is named Kuchi Kara no Kaen (口 から の 火炎, Kuchi Kara no Kaen; Literally meaning "Mouth From the Flame") in Dragon Ball: Daizenshū 7.