Feeling Blue 

Be depressed or sad

I was really feeling blue after she told me she was leaving.

Feeling Blue by Zeto83 August 16, 2008

Feeling blue 

A depressed feeling.

I was feeling blue when after I woke up from bedwetting, and then started to sob even after I snapped of my wet pjs, due to that my Wet Boy's Fruit Of The Loom Blue Stripe Decorative Boxer Brief Undies were still on!

Feeling blue by Herndon Flores August 23, 2020

Feeling Blue 

the emotion of NOT feeling red

"feeling blue? try to feel red!"

Feeling Blue by crow. December 9, 2020

blue butterfly feeling 

when u are feeling blue butterflies is being calm and not having a damn worry about anything, all u want to do is chill, injoy every second slowly, not caring about anything around u, being in ur own world and there is no one in it inless u want them to be and everything feeling like its 3x slower and it feels like ur flouting in space well dying but it feels good at the same time

"yo dude i was so blue butterflysed last night on that lean last night"
"im having some blue butterflies naturaly" blue butterfly feeling

blue butterfly feeling by ijustknowthatsall June 7, 2021

Feeding fish at the blue lagoon. 

This is a euphemism for going to the toilet - the blue lagoon is reference to the use of blue tablets that colour the water in the toilet.

Sorry I was late, I was feeding fish at the blue lagoon.

Feeding fish at the blue lagoon. by Theodore H Biscuit October 14, 2010