A
manga by
Akira Toriyama; the best-selling
comic on the face of the planet. Later was made into an
anime series that is much more well-known in the USA. The different seasons of the TV series are called
Dragonball,
Dragonball Z,
Dragonball GT and probably some others I don't know.
The story starts out as a comedy with a lot of toilet humor and lewd jokes, but later on, it focuses on action. Ridiculous amounts of very predictable action, that reuses the same handful of "plot twists" over and over again and escalates levels of power and destruction so much that it's not even funny.
Basically, it's aimed at 10 year old boys who don't yet have the pattern recognition skills to become bored and think the fact that villain No. 24 is 17 times more powerful than villain No. 23 and thus can destroy 572,214 planets in one go is cool.
For some unfathomable reason, there's also a lot of people who are significantly older than 10 years and still watch the show or read the manga, but I'm in no position to criticize them, seeing that I love Kodomo no Omocha, which is targeted at 12 year old girls...
Oh yeah, and the title refers to the Dragonballs, of which there exist 7, which the characters spend much of their time looking (and fighting) for, because if you have all of them, a dragon appears and grants you a wish. At least, it starts out that way, but the escalation of power levels quickly makes this moot.