Brevity is the soul of wit.

Bread and butter (জীবিকা) At present, Govt. Job is mine bread and butter.

Books are a great source of happiness.

Bolt from the blue (বিনা মেঘে বজ্রপাত) This news was bolt from the blue for Naeem sir

Boar- Sow

Blue blood (আভিজাত্য) Don't boast of your blue blood.

Black and white (লিখিতভাবে) Submit the paper with black and blue.

Black = White

Birds of the same feather flock together. = চোরে চোরে মাসতুতো ভাই।

Better late than never. 

= একেবারে না হওয়ার চেয়ে দেরিতে হওয়া ভালো।

Better half (অর্ধাঙ্গিনী) = She is my better half.

Benign = Hostile

Beautiful = চমৎকার - Gorgeous

Be aware of dog.

Bankimchandra is called Scott of Bengal.