What does it mean if someone starts saying "Ooooh itchy" after farting loudly?

Hemorrhoids

Cleanup on Aisle 2, that's what

their tapeworm is happy

uh oh shidding instead of farding

It means never trust a fart and they trusted that fart and look where it got them.

You misheard them. They said "oooh, it's cheese" excitedly at a restaurant — the fart had nothing to do with it

They got pinworms and are about to start dragging their ass on the carpet like a dog

They want someone to itch it for them but they're too shy to directly ask

itchy tasty

It means they don't wash their ass.

it means they're trying to blame it on Itchy who never did anything wrong