The story of a Goku, Definition of A Goku (noun) : someone who is obsessed with training, eating but always has his family on his head. Someone who also cares for his friends, and will do anything to protect him but is also very clumsy. Not very smart when it comes to life or death situations. Origin: unknown. Example: 1:Why do you have to be such A Goku? Why not be more of A Vegeta. 2: Your such A Goku. Short stories about Goku