It's an archaic Japanese interjection meaning 'yea', 'uh huh'. In modern Japanese fiction it's used similar to いい (ii) in that it can be used as an affirmative or positive ("Yes, that's good"), noncommittally or resignedly ("fine, alright") or dismissively ("Enough!")
by enkephalin07 April 27, 2021
The word umu is another word for agreeing with someone, like the word "yes" or "absolutely" in a cut-er way.
Person 1: Im telling you, the people will love the maid costume!
Person 2: So you are curtain this plan will work?
Persson 1: Yes, Im positive. Let´s get to work!
Person 2: UMU!
Person 2: So you are curtain this plan will work?
Persson 1: Yes, Im positive. Let´s get to work!
Person 2: UMU!
by Weeberuu December 24, 2018
A term used to describe the feeling of becoming saddened by something that would otherwise make an individual uwu. When something is so cute that you uwu in sadness
Acceptable use: ironically
Similar terms: úmù, ùmú, or The Big Sad™
Acceptable use: ironically
Similar terms: úmù, ùmú, or The Big Sad™
Person 1: Wow it's barely been a year and Stray Kids has already started growing up before our own eyes
Person 2: oof you're right umu
Person 1: Did you see Baekhyun's ig live update?
Person 2: uhh yes its big ÚMÙ hours now boys
Person 1: wow rt I'm crying
Person 2: oof you're right umu
Person 1: Did you see Baekhyun's ig live update?
Person 2: uhh yes its big ÚMÙ hours now boys
Person 1: wow rt I'm crying
by yeontan November 13, 2018
by ミラー June 5, 2019
A person whose head is so far up his/her own arse their head has sprouted once again from his/her neck
person #1: i fucking hate that Jack Graves
person #2: i know, he's such a fucking Umu!
person #1: damn straight!
person #2: i know, he's such a fucking Umu!
person #1: damn straight!
by Roo Barb October 7, 2008
by @munmun December 21, 2016