The Big Bang Kamehameha comes from Dragon Ball, where it is the signature combined technique of Gogeta, the fusion of Goku and Vegeta. It merges Vegeta's Big Bang Attack with Goku's Kamehameha into a single devastating wave, first associated with Dragon Ball GT and later returning in games and other Dragon Ball media. Clips of the charge and shout spread through anime edits, fan videos and soundboards because the name alone signals overwhelming power. It remains popular as a shorthand for a fusion-level finishing move.