Tofu is a thick, cheese like substance made out of soybeans. It is Vegan fuel and tastes like what a vegetable's ass would taste like, if vegetables had asses.
Tofu is often used as a meat substitute, in much the same way styrofoam is a meat substitute. The big difference is that tofu has protein and is a poor packing material. Tofu is popular in Asian countries and California as a staple. It is remarkably like cheese, if cheese were made from plants and had no discernable flavor or merits.
Sometimes tofu doesn't look too bad; typically until you realize its tofu. That up there looked a lot like a Klondike bar minus the chocolate, didn't it? But then you find out it is the congealed sweat of a bean, the appeal suddenly gets on a bus and flips you the bird.