Yo Mama Titanic

Listen up, buttercup. This "yo mama" joke is saying someone's mom is so overweight that she's as big as the iceberg that sunk the Titanic. The Titanic was a ship that everyone thought was unsinkable, but it hit an iceberg and went down to the bottom. It's funny because it's rude, like you. You are not smart, just like the guy who wrote this joke. The joke makes you laugh at someone's fat mom! It's low-brow humor for mouth-breathers.