Dr. Slump (Dr. (ドクター) スランプ, Dokutā Suranpu?) is a Japanese manga series written and illustrated by Akira Toriyama. The title was serialized in Shueisha's anthology comic Weekly Shōnen Jump from 1980 to 1984, eventually compiled into 18 tankōbon. The series helped launched Toriyama's career and was awarded the Shogakukan Manga Award for shōnen and shōjo manga in 1982.

Dr. Slump is a gag manga, and bears little resemblance to Toriyama's following series Dragon Ball, though the early Dragon Ball manga chapters are much closer to Dr. Slump in its style and humour. The Dr. Slump manga has been licensed by Viz Media and is currently being published in graphic novel form. The English translation is done by Alexander O. Smith.

Source: Wikipedia