How to say “Somebody wrote their phone number on the whiteboard in permanent marker, and now it's never coming off.” in Japanese
In Japanese
誰かがホワイトボードに油性ペンで電話番号を書いて、もう全然落ちないんだ。
Dareka ga howaitobōdo ni yusei pen de denwa bangō o kaite, mō zenzen ochinai n da.