Roaring, Moving Thing

Alright, listen up, buttercup. This joke is for dummies like you who can't tell their elbow from their patella. It's a riddle, get it? It's asking what thing makes noise like a lion but can't speak, and goes places but doesn't have legs. The answer is a waterfall, genius. Waterfalls are like nature's noisy neighbors, always shouting but never saying anything. You probably think water comes from the store, don't you?