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.
live by ones wit( কথা বেচে খাওয়া )
Slip of the tongue( বলায় সামান্য ভুল ) This is a slip of the tongue, don't lay much stress on it.
By the by( প্রসঙ্গক্রমে ) By the by I came to know that he was ill.
A black sheep( কুলাঙ্গার ) Tom is a black sheep in their family
Cut to the quick( মর্মাহত হওয়া ) I was cut to the quick by his words.