The phrase comes from Japanese, where iroha refers to the basic fundamentals of a subject, so the line works as a shorthand insult for someone lacking even elementary knowledge. As a sound, it circulates mainly among ramen fans and Japanese meme and cooking communities, where the original Japanese wording is kept rather than translated because the scolding rhythm is part of the joke. Its appeal is narrow but durable: ramen culture stays popular online, and a short, specific put-down is easy to drop into edits, reaction videos, and streams without needing subtitles to feel the tone.