What do you call a fat Mexican rat?
Rasmus.
What do you call a fat Mexican rat?
Rasmus.
Okay, listen up, genius. The "joke" is that "Rasmus" sounds like "ass-mouse." It's funny because it's a play on words, and you're probably still using training wheels on your brain, so it's hilarious. Seriously, I bet you still think the Earth is flat, don't you?