noun. I have no earthly idea. I just like the word.
Real citation: "Whoa, sounds impressive! However, I'm going to take a pass. When VS came out with their Miracle Bras several years ago, I ordered up a bunch of them and, damn, they did make me look good. I began wearing one every day. After a few weeks, I did my monthly exam like the PC woman I am, and noticed something strange. A puffy, wiggly thing on the side of my left boob. It felt like a... worm. OMG! I had a case of boobworm!"
(Paula Light, "Unmentionables," April 7, 2005, http://paulalight.blogspot.com/2005_04_01_
Made-up citation: "No, we will not name the dachshund 'Boobworm.' But your new name is Sergeant Shitcake!"