1) Preposterously insane.
It can mean something that is insane beyond someone's wildest imagination, to the point that it becomes contrary to reason or common sense.

2) Something that is really hard to understand, which has to be repeated twice, or thrice before one fully comprehends it. (It can't be over 7 times, otherwise it would be: Unununderstandable.)

3) Something that is unacceptable, and intolerable (esp. by whole societies, or religions.)
1: “Hey, Steve. Why is six afraid of seven?”
“I don't know, Tim McGomnrey. WHY is six afraid of seven?”
“Cuz 7 8 9. Haha..”
“HAHAHA... WAIT... THIS IS UNUNDERSTANDABLE!!”
*****************
2: “And this is why Americans like potatoes.”
“Professor, can you repeat that last part 3 more times?”
*The professor literally repeats it 3 more times*
“It's still ununderstandable, professor!”
“Get the &$@% out you little piece of #%£¥!!”
*****************
3: “I said I wanted a decaf! This is NOT a decaf! This is irregularly ununderstandable on so many levels, you are ALL fired!!”
by Mr. Padwan. September 30, 2012
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Any man who says he totally understands women is a fool. Because they are ununderstandable.
by August 28, 2021
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un·un·der·stand·a·ble {uhn-uhn-der-stan-duh-buhl}
–adjective
incapable of being understood, failing to be understood correctly.
{derived from that of Michael Scott; see misunderstood}

"Any man who says he totally understands women is a fool, because they are ununderstandable." -Michael Scott
by absofruitly February 11, 2008
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it's not possible to understand the subject or sentence
That is ununderstandable!
by sunny laurie January 10, 2019
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I 'clicked forward' today and you all only saw maya.
by JathnTrav June 19, 2004
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un'un′der·stand′a·bil′i·ty
- The ability to ununderstand things.
A: Man, how could you forget these simple rules in just a second, you got a problem or anything?
B: I didn't forget them, I just used my ununderstandability.
A: Your what? I... I don't care, I just can't stand your tomfoolery anymore...
B: If you can't 'stand' it, than 'set' on your chair man.
A: You know what? I'm done, deal with your problems alone, I couldn't care less!
by The Ununderstandable August 2, 2022
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