What is the meaning of the idiom 'Have feet of clay'?

• Have feet of clay refers to 'to have a bad quality that you keep hidden'.

Have feet of clay
English Meaning: to have a bad quality that you keep hidden.
Bangla Meaning: যে দোষ লুকিয়ে রাখা হয়

Ex. Sentence: Some of the greatest geniuses in history had feet of clay.
Bangla Meaning: ইতিহাসের সবচেয়ে মেধাবিদেরও অনেক গুপ্ত দোষ / কমতি / ত্রুটি ছিলো৷

• অন্য অপশন গুলোর মধ্যে -
• be slightly eccentric or mentally disturbed / to be mentally unbalanced - Have a screw loose
Bangla Meaning: কিছুটা উদ্ভট / পাগলাটে / মানসিকভাবে অসুস্থ

• to feel very nervous, usually about something you are going to do - Have butterflies in stomach
Bangla Meaning: খুব বিচলিত বোধ করা

• have as much work as one can do - Have one's hands full
Bangla Meaning: এত ব্যস্ত থাকা যে অন্য কিছু করার সুযোগ না পাওয়া

Source: Website lecture.