Blue 

The feeling when u wake up at 7 in the morning and remembering it's a monday.

"i got the monday blues"

Blue by thepaininmearse October 12, 2003

Blue 

This.

This is blue.

Blue by Literally Anyone March 15, 2017

blue 

The feeling of sadness or loneliness during rainy days.

"So how are u today?"
"I feel blue rn"

blue by nervous_wreak3 November 15, 2020

blue 

The hue of the portion of the visible spectrum lying between green and indigo, evoked in a human observer by radiant energy with wavelengths of approximately 420 to 490 nanometers.

The sky is blue.

blue by Steve August 8, 2003

Blue 

The person who who left you broken.

Why don't you talk to him?

He's my blue.

Blue by itsactuallyesmeralda November 3, 2020

Blue 

Of A Color Intermediate between Green and Violet.

The Clear Blue Sky.

Blue by Mr. Baby Boys Blue November 17, 2014

Blue 

In Australian slang, 'blue':

1. Is a term used to address someone with red hair; or
2. Refers to a physical fight.

1. "How's it goin' blue?"

2. I had a blue with Gazza but he won after kicking me in the balls.

Blue by Ted Tyro September 22, 2009