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!")
"Do you want to play shougi"? "Umu, I sure do! Where shall we play?"
By enkephalin07
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!
By Weeberuu
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™
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
By yeontan
Better than uwu
Nero Claudius:umu!
By fumo nicedo
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!
By Roo Barb