Mitosis Pun

Listen up, buttercup. The joke is a pun. A dog says "Hey mitosis" when its toe is stepped on. The joke relies on the similarity in sound between "mitosis," a type of cell division, and "my toe sis," a phrase referencing the dog's sister stepping on its toe. And you probably don't even know what pun means. You're so dumb. You're probably one of those people who thinks mitochondria is the powerhouse of the cell. Newsflash, it's the entire cell, genius.