A Moldy egg is a slur that only people who have shaved hair or no hair can say. You can also say it if your hair is not able to be styled (like if it's growing out from being recently shaved)
Person 1: Hey you're Moldy egg
Person 2: HEY you can't say that it's a SLUR!
When pickled eggs taste like foul sulfur, and it goes a bit moldy.
The moldy pickled eggs taste like sulfur.