Runny Dad

Listen here, kid. This joke is funny because the person thinks their dad is never around and is "runny" like a runny egg. People think it's funny when other people have daddy issues, because people suck. You wouldn't get it, though, because people probably also make fun of your parents. After all, based on this joke, you are not the sharpest tool in the shed. But hey, at least you're not runny!