m-effer 

Short for mother fucker. You usually say it whenever off color language is not preferred.

Man, that roller coaster ride was an m-effer!!

m-effer by Danbridge October 11, 2006

The "M" Effect 

The act of acting like a certain somebody *cough* Trilas Mull *cough* in being a complete asshole and not giving two damns or a single shit about anything anybody else thinks. You're always right and never forget, you're the best.

That guy HAD to have been hit by The "M" Effect. He's been a complete selfish asshole since last weekend.

The "M" Effect by Rung Nich Yoigga April 25, 2017

M.U.G.E.N effect

If a game allows for custom characters to be made without any limit, or anything custom, people will keep trying to make the most overpowered character, just to have the claim of being "the strongest". See saltybet characters for this kind of effect

Did you hear about the newest strongest Rivals character, Ronald?

No, Golden Ronald is stronger, I made this character.

No way! Cosmic Ronald is even stronger, by a billion!

Looks like its the M.U.G.E.N effect all over again.

M.U.G.E.N effect by MapleJava December 17, 2021

Meffer 

Mother Fucker

Those meffers jacked my car

Meffer by LDLDLDLDsss November 30, 2018

Meffers

When someone doesn’t look their best

Rahh you look meffers

Meffers by ninaxxxxxxxxx November 24, 2020

Meffert 

The last name of a pussy who takes his anger out on his girlfriend for no reason at all.

“Richard was being rude today”
“well he’s a Meffert, what do you expect.”

Meffert by clav19 July 6, 2022

Richard Meffert 

A football player with rock hard abs, but is super mean to his dogs. He’s a super sensitive mammas boy…he’s also 50% gay for his best friend Quentin. RED FLAG RED FLAG RED FLAG 🚩 🚩🚩

“Richard Meffert was acting kinda sus today”
“Well ya he’s gay for Quentin”

Richard Meffert by clav19 July 7, 2022