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?
by xXSCRUBYEETERXx December 15, 2019

by Engineer_dad February 15, 2021

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...
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

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
by Third grade niggas May 10, 2018

by afrodan April 8, 2024

by OK KO February 9, 2021
