Dumbniac 

It’s like braniac, but its when someone is so stupid they have actually perfected their stupidity as an art form.

Person 1: Hey brah, do you think I’m an idiot?
Person 2: Nah man, you a real dumbniac!
Person 1: Yo that’s so nice of you, thank you.
Person 2 (and person 3, suddenly appearing): *wink wink*

Dumbniac by Stupidmfer May 12, 2019

dumbinacan 

a racial slur used agaisnt dominicans. you will never see any domicans refer to another as a dumbinican. such as when african americans say "whats good nigga".

yo miguel you aint a dominican. you's a dumb-in-a-can

dumbinacan by ilcapo June 13, 2005

dumbinacan 

the proper word if you are calling someone dominican

dominicans are just dumbinacan

dumbinacan by ediotor fooll your tight June 28, 2008

dumbnick 

Someone beyond the bounds of merely the word "dumb".

What are you, some sort of dumbnick?

dumbnick by Flay The Skin March 24, 2021

Dumbnacissist

Dumb-Narcissist (simplified definition)

Someone who wants to be a narcissist but isn’t smart enough to be one.

They lie constantly without realizing it, think they’re manipulating people, and believe they’re hiding their intentions really well; when in reality, everyone can see straight through them. They have big ego energy with very small skill to back it up.

Basically: all the arrogance, none of the brains.

“He keeps trying to gaslight everyone, but he’s such a dumbnacissist that it’s obvious what he’s doing.”

Dumbnacissist by Yeetabix December 19, 2025