By the by( প্রসঙ্গক্রমে ) By the by I came to know that he was ill.
Irony of fate( ভাগ্যের পরিহাস ) He could not succeed by irony of fate.
In no time( শীঘ্র ) He will finish the work in no time.
Black sheep( কুলাঙ্গার ) He is a black sheep in his family.
By no means( কোন ভাবেই না ) I shall by no means call on him.
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.
