have feet of clay
US /hæv fiːt əv kleɪ/
UK /hæv fiːt əv kleɪ/

1.
有致命的弱点, 有隐患
to have a hidden flaw or weakness in one's character, despite outward appearances of strength or integrity
:
•
The public was shocked to learn that their revered leader, who seemed so perfect, actually had feet of clay.
公众震惊地发现,他们那位看似完美的受人尊敬的领导人,实际上有致命的弱点。
•
Despite his impressive resume, it became clear that the new manager had feet of clay when he failed to handle the first major crisis.
尽管他的简历令人印象深刻,但当他未能处理第一次重大危机时,新经理有致命弱点的事实变得显而易见。