What's the difference between a hippo and a Zippo?
A hippo is really heavy, a Zippo is a little lighter.
Hippo vs Zippo
Explanation
Explain Bear
Listen up, buttercup. The joke is that a hippo is super heavy, and a Zippo lighter is, well, light. Get it? It's not rocket science, but for you, it might as well be. Bet you still use training wheels, huh?