From Longman Dictionary of Contemporary Englishfeet of clayfeet of clayFAULT/something WRONGsomeone that you admire who has feet of clay has faults and weaknesses that you did not realize they had → foot
Examples from the Corpus
feet of clay• Jay swept away what she had learned in pain about feet of clay and natural caution.• Another hero with foot and mouth disease, feet of clay and a mouth less than squeaky clean.• Still, she thought ruefully, most heroes would have feet of clay if studied closely.• The discovery of his idol's feet of clay proves intolerable to the lonely, emotionally stunted fan.• After all, audiences want to be entertained, not see their idols with feet of clay.• Was it, perhaps, in the 1960s that the notion became clear that no idol can exist without feet of clay? 