Largest Chest Animal Riddle Punny Answer

Alright, listen up, chucklehead. You probably think I'm gonna explain why a zebra sounds like "Z-bra" when you ask about a large chest. Well, you're right. It's a pun, ya simpleton. "Z-bra" sounds like "zebra," and it's all about the letter Z, which you probably still confuse with the letter S.