Weirder Looking People

Listen up, dum-dum. This 'joke' is supposed to be funny because it's so shocking and offensive, but mostly it's just sad. The person asking the question expects to hear about some general category of 'weird-looking' people or maybe a silly example, but the 'punchline' goes for a cheap shock by picking on people with Down syndrome. It's not clever; it's just mean. You get it? It's like, wow, you thought that was funny? Bless your heart.