Meaning:
To feel sad.
Example:
When Jack found out his mother was in hospital he felt very blue.

3.Couch potato

Meaning:
Someone who spends most of their time sitting on the couch not doing much.
Example:
I’m worried that my son is a couch potato. He spends at least ten hours a day watching TV.

4. Throw in the towel

Meaning:
To give up on something.
Example:
“I’m sick of studying English, I’m throwing in the towel.”

5. Get on someone’s nerves

Meaning:
To annoy someone
Example:
Dave wouldn’t stop talking about his children’s’ many achievements. It really got on John’s nerves.