Lou-blue 

Louis tomlinson's eye color. aka the exact shade of blue Harry Styles wanted to wear and the walls to be in the Lights Up music video

Everything in the Lights Up music video is Lou-blue.

Lou-blue by Tonniey October 15, 2020

Twitter Blue 

One of Elon Musks' first ventures after he became the CEO of Twitter. It's the first of many schemes to fuel his goal of monetizing Twitter and squeezing every last penny from it. It's a monthly (purported $8) subscription you pay to get premium Twitter features, which now includes being able to get the Blue Verified checkmark.

I would bet many people are getting Twitter Blue simply for the checkmark now, which completely nullifies its original purpose as a way of ensuring a well-known or honorable person's authenticity.

Basically, Twitter Blue is the equivalent to Discord Nitro, and the Verified checkmark would be demoted to the same function as having a Nitro badge, which means nothing other than the fact you bought their subscription.

Thomas was a broke but renowned copyright-free music producer. After the events of Twitter Blue, he was furious to see his verified checkmark, something that took him ages to get, suddenly disappear. Thomas had never seen such bullshit before.

Twitter Blue by Mary Mary Quite The Contrarian November 3, 2022

Your old friend blue 

That friend who’s been in your life for an extended period of time that you can never remember

A: hey do you remember your old friend blue

E:no I don’t who is blue

A:dude they literally spent every day at your house

Your old friend blue by Rictus the guy February 24, 2019

Light it up blue 

A slogan used by hate group Autism Speaks to promote finding a cure for autism. As a result its better to go REDInstead.

Person 1: Let's light it up blue for Autism!
Person 2: No you asshole! Let's go REDInstead

Light it up blue by YeetleSkeeetles April 13, 2019

The Blue Screen of Death 

the true "blue screen of death" is much more rare than the screen many claim it to be. For those who say it is the screen that says "fatal error" and "press ctl+alt+del" you are WRONG. that is a blue screen but it isnt the BSD. the real Blue Screen of Death give a lot more information and starts out with "a problem has been detected and Windows has been shut down to prevent damage to your computer." This screen means your computer is hosed. Completely.

the screen i have gotten many times was blue, however it was not The Blue Screen of Death

The Blue Screen of Death by M.P.H December 13, 2006

Black and Blue Saturday

the day after Black Friday, when the unwashed masses recover from brutal shopping frenzies - and the corporate plutocrats tally up profits, while watching in-store videos reaffirming that the peasants do indeed deserve ruthless subjugation.
(see youtube: black friday fights)

For the retail giants, there's never anything black or blue about Black and Blue Saturday.

Black and Blue Saturday by ΔиłĦ☼иצ ߀₡ʞ November 21, 2012

Swayze Blue Eyes 

Of or having blue eyes as magical and amazing as Patrick Swayze.

Wow, you've got some Swayze Blue Eyes.

Swayze Blue Eyes by perfectzero84 January 24, 2010