i) To be unintelligent to the point that anything resembling any comprehensive or sensical thought is completely bypassed and unable to be understood.

ii) To be so stupid, so incredibly idiotic, so outright dumb, that on a scale of dumbtitude, one is 50 thousand leagues under the dumb.

iii) iggy
I saw this fan design the other day, it had one prong, not two, or one long one. JUST ONE. There was no way it could work and it just wobbled and bumped into the ceiling. Fucking 50 thousand leagues under the dumb right there man.

Holy jesus christ iggy you're 50 thousand leagues under the dumb. -dre and/or Fox
by starcake August 6, 2003
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When a situationally ethical US President broke his promise to make a rogue country a “pariah” over its grim human rights record, by fist-bumping with its de facto ruler, who green-lighted the murder of a dissident journalist.
The choreography of President Biden's interactions with the Saudi crown prince, which exonerates a grisly murder with the victim being dismembered without the rogue mastermind being made accountable, shows that a bump is worth a thousand words.
by MathPlus July 16, 2022
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A very difficult mathematical operation, which gives as a result 5.7179625e-48, which is a very complex number. A dumb mathematician said that this number is also the result of 1 to the second. That man was murdered soon after.
by Myhuoseisadragon March 3, 2023
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The catchphrase of Jun Manjoume/Chazz Princeton of Yu-Gi-Oh! GX. When he becomes the top of the North Academy, he gains the catchphrase "Chazz it up," while in the original version of the series it is "ichi, jū, hyaku, sen, Manjōme-sandā" (一、十、百、千、万丈目サンダー meaning one, ten, hundred, thousand, Manjome Thunder), which serves as a pun given that the "Man" portion of his surname is the symbol for the number ten-thousand, and is preceded by the numbers one (ichi), ten (jū), hundred (hyaku), and thousand (sen). In the latter case, he also acquires the moniker "Manjome Thunder" (万丈目サンダー; Manjōme Sandā). Due to his insistence that he be addressed respectfully, he often finds himself correcting others who merely call him "Manjome" by saying "Manjōme-san da!" ("It's Manjome-san!"; "-san" being a Japanese honorific). The students of North School, however, mistook the title as "Manjome Thunder" ("sandā" being a Japanese pronunciation of the word "thunder"), and the name stuck upon his return to Duel Academia.
Manjoume/Chazz: ONE, TEN, HUNDRED, THOUSAND, MANJOUME THUNDER!
Fans: Manjoume Thunder! Manjoume Thunder! Manjoume Thunder!
by Keltonsein July 29, 2023
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A phrase used to tell someone that they own 20 thousand lethal weapons.
joe: "hey i own 20 thousand lethal weapons"
bob: "cool"
*20 thousand f-15 fighter jets appear behind joe*
bob: "what the fuck"
by fishisreallycool September 14, 2023
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