For the uninitiated, RapGenius is basically the Wikipedia of rap lyrics — users can upload song lyrics and add explanations to them to give a sense of context and meaning to them.
This is used to fantastic effect, such as when one has trouble understanding what "lo-los" means in the context of Dr. Dre's "Still D.R.E." ("lo-los: lowriders, vehicles with lowered suspension so that the body of the vehicle sits very low to the ground"), or when one is wonder who and/or what the hell the adorably giant songstress Taylor Swift is talking about in her songs.
Well, have no fear, folks: RapGenius users have taken the time to decipher Swift's hit "I Knew You Were Trouble" and distill it down to its base — "Taylor Swift has had tendency of dating assholes who don’t seem to care" (We're looking at you, John Mayer.)
For more on the brilliance of RapGenius and less about my barely-restrained crush on Taylor Swift, check out the site here.