Within the SEO community, some optimization tactics are considered Black Hat SEO. These are tactics which are not considered to be good or fair by search engine operators, search engine optimizers, or web site visitors. There is no generally accepted definition for black hat SEO. What may be considered appropriate by one webmaster may not be considered appropriate by another webmaster. In addition to personal differences, guidelines for appropriate conduct vary across web site categories. What might be considered acceptable for a web site in the gambling industry may not be equally acceptable for a health care web site. Here are several guidelines for determining if a technique should be considered Black Hat SEO.
Black hate would probably refer to hating those of African decedent. If your refering to black hat, it is a term used to describe the building of links in a manner that would be considered unethical or spam like in nature.
black hat seo is buliding the links against the search engine rules for getting high rankings and this is an illegal way
Black hat techniques is illegal way to improve your site ranking it's works fast but your site may be penalize through it..
Hey Black hate also applies for the guys who hate black hat seo ( I really havent met such guys who hate black hat seo ) . now I do not recommend black hat seo or dont support it but in simple words illegal ways to move your site up on the rankings.
There are lots of Black hat techniques, if you want to learn what are those read this http://websearch.about.com/od/seononos/a/spamseo.htm and you can see them here http://www.blackhatteam.com/f2/ but don't do the Black Hat just be aware of what are they in order to avoid them.