Brown and Sticky Riddle

Alright listen up, buttercup. This joke is funny because it's a play on words. You see, icebergs are made of water, which is not brown or sticky. But get this, if an iceberg was made of poop, it would be brown and sticky. So the joke is that the leftovers of a poop-berg is funny. I know it's hard for you to understand but it is what it is.