1. person whom of which races from keyboard to keyboard to keyboard to keyboard (see a pattern forming here?) to yet another keyboard so he can post online messages on Internet bulletin boards and discussion forums. Can often be found belittling innocent people (posters) of said domains. Visit keyboardracer.com for more visual and definitive information.
2. see: flamer, gayrab, manatee, and troll.
3. person whom of which uses many different computers to dupe Internet audiences, webmasters, and website moderators into thinking that the keyboard racer's posts are actually different people and user-names.
4. person whom of which uses different I.S.P. (Internet Service Provider) addresses to pose as different people online. Also known to use Internet anonymous software that masks cookies, route paths, and I.S.P. addresses.
"Yeah, dude... looks like Mr. Keyboardracer just banned from yet another website for his flaming, slandering, profanity, and all out lying. When WILL he learn to stfu?"