Posts 3232 and 3235 of the Blahnik thread pretty well epitomize the term 'ugly shoe'.
http://www.thefashionspot.com/forums/f48/showpost.php?p=4769131&postcount=3232
http://www.thefashionspot.com/forums/f48/showpost.php?p=4771354&postcount=3235
http://www.thefashionspot.com/forums/f48/showpost.php?p=4769131&postcount=3232
http://www.thefashionspot.com/forums/f48/showpost.php?p=4771354&postcount=3235