Dumbening 

A rare, genetic condition found in males, usually surfacing at the on-set of puberty; the result of which is a swift plummeting of the carrier's overall intelligence.

Young Abraham quickly went from smart as a monkey to dumb as a chimp, as a result of his dumbening.

Dumbening by Michael T. Lynch Jr., Scientician October 12, 2003

Dumbening. 

Describes the ever increasing lack of common sense and/or intelligence often displayed in society today.

This is an example of the dumbening.
"What language do they speak in England?"
"Did he really ask that?"
"Yeah, it's The Dumbening."

Dumbening. by Jus. August 9, 2008

The dumbening 

The current state of mankind. Total mind control and absolute ignorance .

Historians will remember this stage of humanity as the dumbening .

The dumbening by Puppywishdestroyer June 25, 2023

Dumbling 

Wearing unintelligent jewelry

Seriously dude? Wearing a 24 carat gold chain with your hoodie? Stop dumbling...

Dumbling by ju13s February 5, 2012

dumbniggawhorebitch 

It means when you say it to someone, they're a dumbass, a black guy, a nigga/girl that fucks with other guys, and a female dog.

You're such a dumbniggawhorebitch, ashley you always doin' that.

dumbniggawhorebitch by Remix Sad January 4, 2017

Dummenting 

Dumb+comment= Dumment

When someone says something out of their league,not cool, something DUMB
..they are dummenting

*Texting*
Griz- You are talking out of your league bruh! Your channel is too small to post stuff like that.

Blake- Dude, your channel is even smaller why even bother?

Griz- I said your content was not for small YouTubers like you ! I post stuff of my own class STOP DUMMENTING!!!

Dummenting by Emporiohak March 7, 2018

Dumblings are Chineis 

Dumb dumplings from China said by a wise man who does not write well in English

Person 1: i want dumplings
Person 2: but you’re dumb
Person 1: i guess ill have dumblings

Person 2: haha dumblings are chineis

Dumblings are Chineis by Roadwork Ahead January 21, 2021