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1. A term for a boyfriend with the disposition of Olaf the Snowman, who is also incredibly injury prone. 2. Something that Mario says on the third jump in Mario 64.
Elsa: "what happened to him!?"
Anna: "he had a sledding accident involving a tree, a reindeer, a small puddle, and four penguins."
Elsa: "oh he is such a..."
Together: "...Mooboo..."
OR
Mario:"whop, whoop, MOOBOO :D"
Mooboo by Funnybunnyboo November 3, 2014
Related Words
Xcal's way of trolling us on his livestreams.
I was going on an ALL CAPS RAGE when I was forsaken by moobot!
MooBot by TwistMyTitties September 6, 2011
It's just a moo box.
Jake, what's a moo box?

IT'S JUST A MOO BOX!!
Moo Box by The Half Blood Walrus November 6, 2012
The typical online Xbox experience where a 10 year old is fucking your mom
Xbox online just ends up being a MomBox after a few rounds of Halo
MomBox by Cold-Solid December 7, 2016

moonoxygen 

>he doesnt know about moonoxygen
moonoxygen by ashmn August 16, 2021
An extrememly large man breast which can be confused as a boob
George:Hey Greg did you see that mooboob last night it was all up in my face?

Greg: Yea it was jiggling everywhere!!!
mooboob by JakeTheDog420 November 15, 2011