1. World Wide Web- the internet. Also the beginning of most website URLs
2. World 3- the evil organisation in the Megaman Battle Network video games.
1. www.homestarrunner.com rocks!
2. Damn those freaks! Their Colorman deleted Megaman again!
Slang: Agreement with a regressive opinion to try to fit in with a crowd. Could be read as short for 'Based on conformity'. The polar opposite of punk.
May have had a different slang definition originally, but this has what it has become through online usage.
Punk:
Living your life your own way giving no fucks what people think = That's punk.
"Based":
Moron 1: ""Hitler had the right idea""
Moron 2: "That's based, bro."