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The official greeting of the moon people, as defined by players of NASA's free online game Moonbase Alpha.

Commonly used a a greeting, proclamation of joy, or exclamation.

Pronounced "aye-yoo".
Astronaut 1: "aeiou?"
Astronaut 2: "AEIOU"
by OldManJenkins9 November 20, 2011
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May 14 Word of the Day
Intelligence agency term for "psychological operation". A government or corporate-sponsored operation, usually taking the form of a "terrorist attack" or "crazed gunman on a spree", with the intent of panicking the public into demanding more police and laws inhibiting freedom. Psyops are usually carried out by drugging a civilian or group of civilians with aggression-promoting drugs, psyching them up, arming them, and sending them out to commit mayhem. Government-sponsored terrorism. See also blackshirts, conspiracy
Person A: Man, that nutcase Martin Bryant guy shot 35 people in Tasmania!

Person B: No, he wasn't a nutcase, that was just a psyop so the government could have an excuse to ban guns.
by Mystikan April 11, 2006
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The Vowels of the English alphabet and how did you not know this
A aeiou are the vowels of the alphabet
by incylix October 27, 2020
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v o w e l s a r e n i c e
Astronaut 1: a e i o u a e i o u a e i o u a e i o u a e i o u a e i o u a e i o u a e i o u a e i o u
Astronaut 2: e y u i o a
Astronaut 1: I give up.
via giphy
by I LIKE CHEEEZE September 11, 2020
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(pron. AY-oo)

1. The standard set of vowels in the Latin alphabet.

2. An uncommon way of saying "Hey, you"
1. The vowels in the alphabet are A, E, I ,O, U and sometimes Y.

2.

GreenX: hey tober
Tober34: aeiou
by Sudomoodo June 05, 2011
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5
Welcome to vowels

Ayeeeeeee
Eeeeeeee
I
Owe
U
;)
AEIOU: are the Vowels and Ayeeeeeee, Eeeeeeee, I, Owe, you is just a weird way of remembering it ;)

Dude 1: hey! What are the vowels again?
Dude 2: let me put it this way
Ayeeeeeee
Eeeeeeee
I
Owe
U
by figiHoE April 20, 2019
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6
1: the word to say when you have nothing else to say
2: a saying when you owe someone money
3: when your so excited you scream AEIOU (pronounced ay-oo)
4: something you type when your bored
Man 1: aeiou...
Man 2: aeiou $20
Man 3: OMG AEIOU!!!!
Man 4: (types aeiou to see what comes up on google)
by Camer Londerin January 20, 2018
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