What is It? game 276

It's time for the latest edition of our collaboration with the always amusing What Is It? Blog. Can you guess what this thing is? This week, You'll have to be pretty specific to win. Or if you don't know what it is, make up something funny!

Place your guess in the comment section below. One guess per comment, please, though you can enter as many guesses as you'd like in separate comments. Pease do not post URLs or weblinks, as doing so will forfeit your entry. Two winners: the first correct guess and the funniest (albeit ultimately wrong) guess will win T-shirt from the NeatoShop.

Please write your T-shirt selection alongside your guess. If you don't include a selection, you forfeit the prize, okay? May we suggest the Science T-Shirt, Funny T-Shirt and Artist-Designed T-Shirts?

See more pictures of this mystery object at the What Is It? Blog. Good luck!

Update: the pictured object is a rock, but despite many guesses, the What Is It? blog was never able to ascertain anything else about it, which means there is no correct answer this week. So… we decided to pick two of the funniest answers! StilesJM declared it to be C-3PO's kidney stone, which is certainly good for a t-shirt! And Anthony Zaragoza told a great story that's a winner:

A deadline was fast approaching for Clark Kent. But during his speed-typing, the IBM Selectric typewriter ball had a meltdown from the friction. The story that would have exposed the insidious 4-H organization was never published.

See the answers to the rest of the mystery items of the week at the What Is It? blog.