The Moomins are the central characters in a series of books by Finnish writer Tove Jansson, originally published in Swedish. They are a family of Scandinavian trolls who are white, round and furry in appearance, with large snouts that make them resemble hippopotamuses. The carefree and adventurous family live in their house in Moominvalley, though in the past their residences have included a lighthouse and a theatre.

Moomintroll - the main character of most of the books, a spirited teenager with a keen sense of adventure and fun, and a generous spirit.
by little my June 12, 2006
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Moomin has several uses. It can be used in the same way as, "vibing", and can even be used to show that you are looking forward to something. Similar to "Mmmmm, sandwich time soon".
EXAMPLE 1
Person 1: Hey, what are you up to?
Person 2: Ahh, ya know, just moomin

EXAMPLE 2
moomin sandwhich time soon!!
by x10234 April 12, 2021
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It is the action to describe what Vtuber Nanashi Mumei does, but this action is the absence of expectations, and the presence of surprises, essentially it forms the essence of what Mumei does, hence she is mooming. In other words, it is to describe the horrific or silly actions which may happen under Mumei's actions.

Related ways to spell the word is:
- mooming
- moom (singular representing the vtuber herself)
- mooms (possessive form)
Nanashi Mumei had overslept because she was mooming.

Nanashi mumei had not spared a single store vendor, as none she escape the moon when she is moomin.
by GeniusTraitor May 5, 2023
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A comical term given to Gay people.
An alternative to using the word queer so that it can be said openly in public without raising eyebrows or causing offence.

"It's full of bloody Moomins in here!"
by Rusty Member December 22, 2006
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A strange and extremely rare group of cow/hippos that used 2 hang around with a girl that looked like she was on acid.

Or a dipsy/forgetful person
Woah ull never guess what i just saw? A flying moomin!

Claire ur such a bloody moomin!
by Denny's l'il sis September 9, 2004
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indeed this may be a strange hippo like cartoon (originating from germany), but a moomin is much much more. if thou happen to know a boy who is podgy, with a pronounced, snout like face, he may be refered to as a moomin. other names for this kind include 'Peru'
hahaha, did you just see moomin fall over?

moomin just swang for square 'ed!

moomin you absolute gee!
by hardcoregeek May 11, 2005
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1)Cartoon creature from back in the day. 2)Kathryn, lives in Fulbourn, often found in DeNiro's, Newmarket. Also see bugger-lugs.
Kathryn looks like a moomin - she bugger-lugs!!
by Seb September 10, 2003
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