Nerdcore is a genre of hip hop/rap music that touches on topics like computer hacking, out-of-production soda infatuations, playing video games, email spamming, robots, star wars and other obscure movie characters, etc. Artists vary greatly in their styles. Some rap in a style similar to mainstream artists while others sound, well, nerdy.
Nerdcore Rising the movie comes out soon. Check it out.
Some of my favorite Nerdcore arists:
ytcracker
Optimus Rhyme
MC Chris
MC Paul Barman
Post if you have anything to add!