DummyDum 

Another way to say "stupid". Comparable to "noob" which also means "stupid"/"ignorant".

noob dumbutt

"So what are you going to do for your birthday today?"
"Wait, it's my birthday?!"
"You're such a dummydum."

DummyDum by bemai. May 31, 2011

Dummydumb 

to act in a stoopid manor. or as in act dumb

ok you big Dummydumb

man that bitch was being a dummydumb

Dummydumb by Albro. January 24, 2008

Dummydumdum 

For someone that litterally doesn't have a brain.

* Playing MInecraft*
*Mines diamonds with stone pickaxe.
Friend- OMG you dummydumdum

Dummydumdum by TheGuyThatDoesn'tGiveFreeVbuck September 24, 2019