A person that moans really loud during an orgasm.
Last night, I had a mauna in my room.

OHHHHH AHHHH MAUNAAAAAAAAAAAAAAA!!!!!!!!!!!!!!!!!!
by Todd Sweetsour February 27, 2007
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A defecation (a "number two") so large that it breaks the surface of the water in the toilet. Named after the original Mauna Loa, is the largest volcano on Earth in terms of volume and area covered, and one of five volcanoes that form the Island of Hawaii.
"I had to go to the bathroom SO bad that I dropped a Mauna Loa"!
by DKWSea October 30, 2011
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The tallest volcano in Hawaii.

It’s also a sacred place to the Native Hawaiian people, which is why when a company started building a telescope on it, a bunch of people got pissed and protested.
Protestor: ʻAʻole TMT! Mauna Kea is sacred!
by greenglobe March 10, 2021
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