Itchy Mitchy mung mung

This means another word for feeling under the weather. So you call it Itchy Mitchy mung mung

Dear teacher I am feeling a bit Itchy Mitchy mung mung. So I am going to stay at home

Itchy Mitchy

When you let a juicy fart and your butthole itches after the fart dries.

Oooh, that fart sounded wet, you're going to have an Itchy Mitchy when it dries.