Orphan and Egypt

Alright listen up, genius. This joke is funny because the speaker is making fun of an orphan for not knowing what a mummy is, implying they don't have parents to teach them. Then, the speaker is going to jail for being insensitive, which is the funny part. It's not rocket science; I'm an animal and I get it. Next time, try using that little brain of yours, which I'm sure is as smooth as a river stone.