Meaning: be a great commercial success, to dispose of something very quickly and with little effort.

Example:
1. These books are selling like hotcakes.
2. John says that the new cars are selling like hotcakes.

Meaning: an overview.

Example:
This website gives you a bird’s eye view of the Idioms used in Indian exam system since British times.

Meaning: a possession that is worthy. To be satisfied with what one has rather than aiming for something bigger which could lead to even losing the little that is already with the person.

Example Sentences:
1.- The fact is that he did not realise that a bird in the hand was worth more and went after having an extra marital affair. Now he neither has his wife nor his girlfriend.
2.- I know that a bird in the hand is more important and hence will not be quitting my job to enter into the stock market.

Meaning: pay the bill. To cover the costs of something. To provide the payment for an expensive bill.

Example Sentence:
1.- It was a splendid party and I’m glad that I don’t have to foot that particular bill.
2.- Don’t be angry, I will foot the bill for damage to your car.