Translation

aiai means "Aye-Aye" in English.
It's a katakanization, a loan-word.

aiai is normally written with katakana, as アイアイ.
aiai written with hiragana is あいあい.
aiai does not have kanji.
Romaji a i a i
Katakana
Hiragana

Synonyms

Further Reading

Wikipedia: アイアイ