lol at people that expected this to be a metal genre. There are 3 types of hardcore: hardcore hip-hop, hardcore punk, and hardcore techno. Metal actually doesn't have any hardcore variant; the genre 'metalcore' is heavy metal mixed with elements of (modern) hardcore punk. However, by these rules, nerdcore should be a form of hardcore hip-hop, but it isn't, so it is a stupid name for the genre. Slowcore is another example of a stupidly named genre because the 'core' suffix doesn't refer to any hardcore variant of an existing genre. The same goes for nerdcore - it should be called 'nerd hip-hop' or something similar.
Some Nerdcore is good (Kabuto the Python, Deafinition. mc chris, MC Frontalot) others not so much (magitek, Benjamin Bear) don't judge the whole genre by name and description judge by how good it is. also at petergriffin91 its because core doesnt always refer to metal. it can mean it focuses mainly on whatever subject it follows so this focuses on nerdy topics.
Watched the documentary Nerdcore Rising the other day and there was one of the guys from De La Soul giving it props.
Nerdcore is people writing music about what they know and love, therefore, keeping it real in the true hip-hop tradition.
And i still makes me giggle.