Porpith
A large terrestrial mammal with a lisp, often associated with the hippopotamus family. They're most commonly found by naive travelers of East Africa mistaking a porpith for a hissing snake.
Jim: "Hey, did you hear that hissing sound coming from that family of hippopotamuses?"

Steve: "Yeah, that was probably just a porpith. They're more common than you think."

Jim: "Um, what's a porpith Steve?"

Steve: "Ah! Funny you should ask... look it up on unbandictionary.com!"