meconium 

a dark greenish mass that accumulates in the bowel during fetal life and is discharged shortly after birth

The nurse cleaned up the infants meconium

meconium by Nobody Beats The Rez February 8, 2018

merinium 

The days in between Christmas and New Years Eve, the through in between the peaks. A merry twist on the Perinim - the space in between the anus and the sexual organs

I pity the unlucky souls with birthdays in the merinium, everybody’s just about done and only thinking about NYE!

merinium by Mr Teeee December 28, 2022

Meconium-eating sister-fucker 

A white working class person. Meconium is the tarry shit evacuated by newborn babies.

People from West Bromwich are a bunch of meconium-eating sister-fuckers

Meconium-eating sister-fucker by Paul C. August 8, 2003

Meconium Clout Syndrome 

When the sperm donor (father) of a moments-old newborn baby is far to preoccupied with posting photos and videos of himself and his exhausted, disheveled baby-mama to give a single visible shit about their newborn child, her welfare or the enormity of this moment in his life. Not infrequently he is making jokes about the birthing process and how he was like "no F-ing way" the whole time and how grossed out he was, "like you can't even believe the mess the birth process makes- so glad somebody's going to clean that up- like seriously, man!" Meconium Clout Syndrome has a very high mortality rate, almost always under very suspicious circumstances.

OB: Congratulations Mom and Dad!! She's a beautiful healthy baby girl and she's all yours!!!
Mom: She's beautiful!!! Aiden, look at your new daughter- she's perfect!
Father: staring into his phone Ok everybody, she just had the baby- like she was screaming and it was so gross- like an alien just squirted out of her- she's a total mess right now- let me get a shot of her pans phone towards mom who looks away and covers her face in embarrassment and exhaustion C'mon babe- smile for my followers!! Look over here! This is going to be the BEST video I've ever posted... This is going to be SO epic!!!
OB: looks at neonatologist} Textbook Meconium Clout Syndrome- a [pretty serious case- I'm not sure this guy is going to survive once they get home...

Meconium Clout Syndrome by Asclepius Minora February 15, 2023

Moronium 

Slang for brothel (derived from moron)

Me and Gill are gonna hit the Moronium on Saturday

Moronium by J.L.Finney October 18, 2020