Carry the day ( জয়লাভ করা ) Rajib, the best player of the school, carried the day in the annual sports.
In black and white ( লিখিতভাবে ) Put down the statement in black and white.
Slip of the tongue ( বলায় সামান্য ভুল ) This is a slip of the tongue, don't lay much stress on it.
Dead of night ( মধ্য রাত্রি ) The robbers broke into the house at dead of night.
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.