Skip to main content

u/

u/ means username/ and it is used in Reddit and is well known in the Reddit community. People use u/ insert random name here to mention a random Redditor to tell them to get their butts onto a post or to show others who the person is. BE AWARE that when you mention somebody they can see what you commented that made them go onto the post
Anne: Hey Harry how do I mention a Redditor again I'm still new to this website, please help.

Harry: You just type u/ and then their Reddit names and there you go that's the dummy's guide to mentioning somebody on Reddit.

Anne: Did you just call me dumb?!

Harry: No...
by u/welikeReddit1 January 20, 2021
mugGet the u/mug.

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
by OK KO February 9, 2021
mugGet the boi u dummug.

No U

Phrase used to counter any insult no matter the intensity. This will reflect any insult back to your enemy with the effectiveness of a 100x
Bully: You’re mother is an intellectual.
Me: No U.
Everybody else: *expression of complete shock*
by Third grade niggas May 10, 2018
mugGet the No Umug.

u

Lazy-type for you
by Chrispacito July 14, 2019
mugGet the umug.

No U

No U is a way to reverse the action that somebody has done to you are said to you. Kinda like a Uno Reverse card?
Kate the thot said “I’m blocking you on my contacts!!”, so I said “No U”
by xXSCRUBYEETERXx December 15, 2019
mugGet the No Umug.

U

by Highschoolgraduate4.0 August 15, 2025
mugGet the Umug.

Share this definition