The word "bad's" origin is not known very well, but we know it wasn't really used until 1400 when the word "evil" was more commonly used. The word was eventually turned into modern middle English. It is usually used to describe something negative but our generation totally turned it around to make it something positive.
Why it's important to us
This word is important to the 21st century because we all don't want to be the same as everyone else. We want to make our own trends so that's why we begin to make new slang words and terms. The word bad is just part of the English language, but the teens made the word bad mean a good thing. In the 21st century being bad is cool. So by making a good thing out of a word that means something that is the complete opposite, is very cool or unique and put's us in a different category then any other generation