Kid: Dad, what's a dark joke?
Dad: Well, you see that guy over there? Tell him to wave.
Kid: But Dad, I'm blind.
Dad: Exactly, also the dude had no arm.
Dark Joke About a Blind Kid
Explanation
Explain Bear
Alright, listen up, buttercup. The joke is funny because the dad tells the blind kid to wave to a guy, which is already messed up. But then, BAM! The dad drops another bomb by saying the dude has no arm. It's dark because it's funny because it's messed up. By the way, I bet you still use training wheels. Sad!
igloo and you
Lol the end