interjection
hai
HEYE
interjection
1
An informal greeting; a playful or stylized spelling of "hi."
"She texted back "hai!" with a smiley face."
How to Use Hai
Learner’s notesIn plain EnglishA casual, playful way of writing "hi," popular in internet slang.
When to use it
Very informal; used mainly in text messages, chat, and online communities.
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She texted back "_____!" with a smiley face.
Etymology
A deliberate respelling of "hi," modeled on romanized Japanese spelling conventions.