Me: Knock knock.
My sister: Who's there?
Me: I eat mop.
My sister: I eat mop who?
My mind: I eat my poo.
My sister getting it.
Me: Knock knock.
My sister: Who's there?
Me: I eat mop.
My sister: I eat mop who?
My mind: I eat my poo.
My sister getting it.
Listen up, buttercup. This joke is all about setting up a classic knock-knock gag, but with a twist. Instead of a normal name, the punchline is supposed to sound like "I eat my poo." It's funny because it's unexpected and a little gross, which is basically your sense of humor in a nutshell. You probably have no friends.