On the wane( হ্রাসমান ) His fame is on the wane now.
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.
Lion's share( সিংহভাগ ) He took the lion's share of the profit.
slap on the wrist( মৃদু শাস্তি ) Although he broke the rules, he was only given a slap on the wrist
Gala Day( উৎসবের দিন ) The 15th August is a gala day to the Indians.