Tonight might be a very important and momentous occasion, with a black man securing a major-party presidential nomination for the first time in history and all, but Anderson Cooper isn't going to let that stop him from being outrageous and giggly. The dreamy CNN anchor was interviewing Donna Brazile, strategist for a long string of failed Democratic presidential candidates, when he said something complimentary that made her blush and declare, "you're not my boo." When Cooper replied that "I want to be your boo," everyone got a little flustered and giddy and, probably, confused. Anderson, clearly lost at sea, asked everyone to explain what the word "boo" means to him at some later time. In the meantime, Cooper should be thanked for ensuring that tonight really was an important time for bridge-building and new directions in America. Clip after the jump.