Lipsync-offs are great and all, but when Jimmy Fallon has a sharp improviser like Ricky Gervais on his show, there's only one recurring segment that makes sense: Word Sneak.

Although Gervais didn't have to slip anything as spicy as "badonkadonk" into the conversation, he did invent a pretty good cheat: Any random noun can be funny when you use it as a nickname for Jimmy Fallon's penis.