It would have to weight next to nothing and possibly be made of origami.

WTF Are you talking about Jesus Diaz is the reason i come to Gizmodo!

If you are actually going to try and memorize these, it's much easier to do so with Tom Lehrer's version. Sure it's missing a few, but it's much more fun, and MUCH less annoying.
(I listened to this song enough as a kid that I had the whole thing memorized, but I've since forgotten a few. Still a fun, if nerdy, party…

I still like this one better

Someone actually was taught that 8-2+1=5??

Not to be "that guy" but dictionary.com isn't exactly a reputable dictionary.

I cannot into the phone! Has anybody ever been as far as?