[rectang]

Acronym expansion for those-not-in-the-know (such as me before a web search): WAI might mean "working as intented", or possibly "why?"

[201984]

Thank you. It's frustrating when people uncommon acronyms without explaining them.

[maxverse]

AI is helpful for this, but I also built https://www.hackterms.com eight years ago for this exact reason.

[Vinnl]

And of course good old Urban Dictionary: https://www.urbandictionary.com/define.php?term=WAI