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Feel Blue

Feel Blue.

English
idiom

To feel sad or depressed.

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What it means...

To feel sad or depressed, often without a specific reason.

When someone feels blue, they are going through a low mood and lack their usual energy or enthusiasm.

It's a gentle way to describe sadness that doesn't need to be dramatic.

Use it when…

  • When someone feels down after a quiet or uneventful period
  • When a person is missing someone they care about
  • When the end of something enjoyable leaves a lingering emotional void

Don’t confuse with...

Wrong icon

"Down in the Dumps"

Feeling very sad or demoralized, stronger and more prolonged than feeling blue

Wrong icon

"Under the Weather"

Feeling physically unwell, not emotionally low

Correct icon

"Feel Blue"

Feeling gently sad or low, often without a clear specific cause

Where you’ll hear it

You’ll hear the "Feel Blue" idiom in real life — at work, in relationships, or in the media.

Work & Business

Office Conversations

She seemed a bit blue after the project ended — that kind of post-launch slump is common.

Relationships & Social Life

Emotional Situations

He'd been feeling blue since his friend moved away and wasn't quite himself.

Media & Everyday Life

Social Media

Her caption read: 'Rainy Sunday, missing home — just feeling a little blue today.'

Use it like this

Here’s how to use "Feel Blue" idiom naturally in real conversations, with real examples.

Work & Business

Problem-solving

Colleague

You seem quieter than usual — is everything okay?

You

Just feeling a bit blue lately. Thanks for noticing.

Relationships

Talking to partner

You

I've been feeling blue all week. I can't quite explain it.

Partner

Let's do something nice this weekend — I think you need it.

Everyday Conversations

Casual chats

Friend

You don't seem yourself today.

You

Just feeling a little blue — I'll be fine. It just hits sometimes.

Last updated:
April 20, 2026

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