This got awkward...

You didn't realize you wanted a giant drawing of Abraham Lincoln on your shirt until you saw it. It's elegant yet somehow unnerving. The Mighty Squirm specializes in historical and gothic shirts, and they're fantastic. This one even features Honest Abe on the back building a railroad. I hadn't even realized that he'd been a rail splitter before pursuing politics. See, a history lesson with every shirt...

Gorilla Warfare

Love this. It comes from the site Arm the Animals, which has a whole series of shirts with animals and arsenals (and donates to animal charities). The "occupy" meme is my fave.