Wibu is Indonesian slang for a person who is deeply, sometimes excessively, obsessed with anime and Japanese pop culture, and 'ih' is a common expression of disgust or disbelief. Together, the phrase works as a quick, teasing callout in online humour, especially in short-form videos and meme edits where a creator wants to poke fun at exaggerated fandom. Its brevity makes it easy to reuse, and because the joke depends on a shared slang term, it still lands with audiences who recognise the reference.