Song: Lil Wayne "A Milli" (2008)

Lil Wayne gets his Dr. Nick Riviera (from The Simpsons, duh) on on one of his biggest tracks of all time. Does Wayne really think menstrual bleeding is a venereal disease? You'd think with all those vayjayjay-centric rap lyrics, the guy might understand the basics of how female anatomy functions. On the flip side, though, the line sounds cool. But whatever the opposite of a knowledge jewel is, it's this.