MUO 

MUO is short for "My Useless Opinion". The user of this phrase is expressing a tempered opinion using self-deprecation. In using MUO they are making it clear that they are not interested in being a confrontational jerk (actual or perceived) about their opinion. People using MUO recognizes that their opinion could be very wrong and that they are willing to have constructive discussion concerning it.

"MUO is that Cheddar is the single most popular cheese in the world."
"MUO is that the film UHF should have won the Academy Award for Best Picture."
"MUO is that the term 'MUO' is a silly construct."

MUO by Illya Kuryakin December 25, 2022

Rou Jia Muo 

A popular Chinese fast food, Americans also call it "Pork belly steam bun".

I'm so hungry now, let's go get a Rou Jia Muo.

Rou Jia Muo by distinto March 13, 2015

MUON 

A muon is an unstable, negative particle with weak interactions and a heavier weight.
Karen is also unstable and negative, and has weak interactions with people coupled with a hefty poundage.

Karen: “You think you know everything just because you’re a theoretical physicist!”
Sheldon: “Well in those terms, you’re still a MUON!”

MUON by Streamer151912 March 3, 2021

muot 

Pronounced mot- mought - mort .
It means idiot, or anything bad about a person.

James Dubanos is a muot.
This kid is a really big muot.
Look at all those muots over there.
This place is infested with muots.

muot by muot December 3, 2006

muoio 

Muoio, literally meaning, "I die," in Italian, is a last name reserved for only the elite. If you know a Muoio, you is blessed. They are rare, and pretty easy to piss off, so if you do meet one, hold on tight. They are intelligent, beautiful, incredibly impulsive, and hilarious people.

"Yeah, she crazy dude. She's a Muoio."

muoio by TotallyNotAMuoio February 10, 2018

Muopsies 

When you observe either an appearance or a behavior of someone that really bothers you and you can't quite find the right word to describe this annoyance - Calling some a Muopsies (adjective) or naming someone a Muopsies (noun) is a combination of all of the derrogatory words you were thinking of into one.....perfect.....word

That Muopsies wearing the striped shirt is holla'in at your girl!!

Don't be such a Muopsies Jones.

Only a real Muopsies would not drink this liter of vodka.

Muopsies by PC so Greasy July 18, 2007

Muouhg 

If someone or some is being crazy, insane, or just plain stupid.
Can also be used to describe a person, place, or thing.

“You better watch out for him, he’s a crazy muouhg”

Muouhg by Hashsimons July 24, 2019