Top definition
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
Get the mug
Get a aeiou mug for your coworker José.
2
(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
Get the mug
Get a aeiou mug for your mama Yasemin.
3
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
Get the mug
Get a aeiou mug for your buddy Vivek.
buy the domain for your pet blog
5
Noun; AYE-yoo; The feeling of physical curiousity which prompts at a first encounter - a precursor to an infatuation.
I had a sense of aeiou when first saw her strange yet alluring molehair.
by Kevin Chau, aka CptnQuiefus January 28, 2004
Get the mug
Get a aeiou mug for your dog Trump.