At once finger ends ( নখদর্পণে ) All these facts are at his finger ends.
Rank and file ( সাধারণ লোক ) We should pay attention to the rank and file of the country.
Through thick and thin ( বাধা বিপত্তির মধ্য দিয়ে ) Reveka followed her husband through thick and thin.
Lame excuse ( বাজে গুজব ) This lame excuse will to do.
A blessing in disguise ( বিপরীতে হিত ; প্রথমে খারাপ হিসেবে মনে হলেও পরবর্তীতে ভালো হয় ) Sam's motorcycle accident was a blessing in disguise because he got enough insurance money.
In a nut shell ( খুব সংক্ষেপে ) Tell the story in a nut shell.