Shaving cream pie, the ones they throw at politicians.

I suspect poopie pie would rate so, though not lacking in texture.

Pork rind pie wouild likely be bad for your veins. (here isa crust) pork rind pie

How about sardine pie sardine pie

How would spam pie rate (this one is even upside down)http://www.plaidponyvintage.com/recipes/recipe-pages/recipe-spampie.html

Toe nail pie
http://www.flickr.com/photos/zonkout/617588930/

Booger pie
http://debbidoesdinnerhealthy.blogspot.com/2010/11/booger-pie.html

Dog Food Pot Pie


Quebec has a sugar pie, it may one of the most honest pies...that is what many of them are anyway.