noun. Balls of steel. Very, very small steel that no one can see, except for leprechauns and protons.
Real citation: "I dunno. Judging from his name and his pissy attitude, I'd think he must have nano-nads."
(June 19, 2003, Too Much To Dream, http://spleenville.com/~lilith33/blog/mt-comments.cgi?entry_id=1825)
Made-up citation: "You may think I--as a lifelong coward--have nano-nads, but, well, um, er, uh... My dog doesn't have any nads at all, because he's neutered. So there. Also, if you really want a precise measurement of my testicular endowment, you'd better ask your mom."