Stinky Tofu:
http://en.wikipedia.org/wiki/Stinky_tofu
<img src="http://farm3.static.flickr.com/2109/2084551257_273d240ec9_o.jpg" width="220" height="148" alt="Stinky Tofu" />
My wife and her sister love this stuff...my brother-in-law and myself think it smells and tastes like dog poo. Fortunately we all agree that the worst is:
Durian:
http://en.wikipedia.org/wiki/Durian
<img src="http://farm3.static.flickr.com/2381/2084551227_756bbace97_o.jpg" width="260" height="197" alt="Durian" />