"Juubei" meaning "Ten Times" (Roughly) and "Kamehameha" meaning "Giant Turtle Wave".
Combining the two gives you the
Juubei Kamehameha, or the Ten Times Kamehameha. The most powerful attack (Next to the Genki Dama) in 'Dragonball GT' Gokou uses this attack frequently after becoming a level four
Super Saiya-jin (
SSJ4)
Gokou uses the
10x Kamehameha to defeat the
Syn Dragon in 'Dragonball GT'!