1.Drag one’s feet : Take longer than necessary to do something.

Usage : If you drag your feet, you will not be able to finish your work before the deadline.

2. Down in the dumps : Depressed.

Usage : I feel down in the dumps today.

3. Couch potato: A person who watches too much television.

Usage : Don’t be a couch potato. Be active.

4. A piece of cake : Very easy.

Usage : Your exam must have been a piece of cake for you. You had studied very hard.

5. Sleep on it : Take at least a day to think about something before making a decision.

Usage : You don’t have to decide right away. You sleep over it and tell me tomorrow.