The phrase combines oi, a rough way to grab attention in Japanese, with baka, a common insult meaning idiot that anime fans recognise worldwide. Clips shouting the line spread through meme edits, soundboards and short videos where creators needed a fast, exaggerated scolding reaction. Its popularity comes from how clearly the delivery reads even for viewers who do not speak Japanese. The repetition builds anticipation and the long final syllable works like a punchline, so the sound remains a staple for fail compilations and playful roasts.