U Dum 

U Dum is a game where you, the player, tries to get the attention of another player in a variety of ways. After gaining their attention, you immediately shout "U Dum!" However, the defending player may preemptively shout "U Dum" after you have gotten their attention, nullifying your initial attempt.

Todd: "Hey Blair, I learned something interesting about you this weekend."

Blair: "Really? What's that?"

Todd: "I learned that U Dum!"

U Dum by weenius September 10, 2010

boi u dum 

boi u dum is the worst insult ever created so dont use it regularly

eric: DiD u SeE ThE nEw FoRtNite SkIn? me: BOI U DUM

boi u dum by OK KO February 9, 2021

u dumb boi 

said or done something incredibly stupid

so my brotha said "man i feel like i can fly" and i said to him "nah u dumb boi"

u dumb boi by omgthatshim February 5, 2010

is-tch'u-dumb 

the most gangster way to say are you dumb to someone that is a retard.

"let's visit jenny"
"is-tch'u-dumb you know she is a bitch

is-tch'u-dumb by AFIkid January 22, 2007

U Dumb As Hell Boy 

said by Conner Temple Tv.

He Called Me Dumb

"Wheres the Gc" "U Dumb As Hell Boy"

U Dumb As Hell Boy by fouledanchors June 22, 2022

u dumbass we do not have a website 

hahah. u so unbelievably dumb

person 1 says some dumb shit
person 2 kicks him out of the conversation, puta him back later and semds this link. person 2 put a lot of time and effort in this site.
person 1 klicks the link and be sooo fucked. he be thinking:" lmaooo he got me gooooood"
u dumbass we do not have a websitebis used for that exact reason

u dumbass we do not have a website by benjiboy 1837282993 June 10, 2018

Y U DUMB? Elementary School 

The name of the school in SML...

I just went to Y U DUMB? Elementary School - I give it one star because the teacher (Jackie Chu) is dumb

Y U DUMB? Elementary School by PhoneGuyYT June 3, 2025