Cyberpunk is a literary genre characterized by advanced technology (often including transhumanist elements such as the ability to connect one's brain to the Internet), a dystopian aesthetic often described as "high tech, low life," and powerful mega corporations which have largely supplanted nation-states as the dominant political power centers. One of the most significant works in the genre is William Gibson's Neuromancer, which coined the term 'cyberspace.'

So basically the world we live in, but with cooler technogadgets.