Down in the dumps means feeling sad, discouraged, or low in spirits. The phrase has been around since the 1700s, and the important clue is the older word dumps.
Today, many people think of a trash dump, but that is not the original idea here. In older English, the dumps could mean gloom, melancholy, or a dejected state of mind. So if someone was down in the dumps, they were in a low emotional state.
Example: After hearing the bad news, he was down in the dumps all afternoon.
This is an idiom, so the meaning is figurative, not literal. It describes mood, not location.
- Correct: She has been down in the dumps since Monday.
- Not literal: It does not mean she is physically in a dump.
- Close meaning: feeling blue, feeling low, a bit gloomy.
The phrase has lasted because it is vivid and easy to understand once you know that dumps once meant sadness.