It's once again time for our collaboration with the ever-amusing What Is It? Blog. Do you know what this thing is?
Place your guess in the comment section below. One guess per comment, please, though you can enter as many as you'd like. Post no 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-Shirts, Funny T-Shirts and Artist-Designed T-Shirts?
There's more objects to guess posted at the What Is It? Blog. Do your best, and good luck!
Update: Berhard was the first of many with the correct answer; this is a trowel bayonet. Fafa had the funniest answer: a combination pizza server and zombie defense knife! Both win t-shirts from the NeatoShop.