A: What on world do you mean? I'm sorry I really don't know what you're talking about. (*) world (*) sorry (*) you're talking
This is a companion discussion topic for the original entry at https://english.best/questions/24555,a-what-on-uworldu-do-you-mean-im-usorryu-i-really-dont-know-what-uyoure-talkingu-about/