down in the dumps

(idiom) to be acting in a depressed way

Example Sentence:

I’m sorry I’ve been so down in the dumps lately. I’m just upset because my girlfriend left me.

Anna is down in the dumps because her father just died.

From the Blogs:

Down in the dumps: The poor rabbit left in a wheelie bin

Media:

Similar idioms:

1. bummed
2. bummed out
3. down in the mouth
4. in a funk
5. downhearted
6. blue