He's saying "PENGUINS" (I promise).

Gavin recently acquired the movie Happy Feet, a story about some penguins. And he's obsessed. He never stops asking me if he can watch it, but his pronunciation is about the funniest thing I've ever heard. Just check out the below video.

(WARNING to those who might be offended at the mention of male body parts: you might give this a skip. 

Or just lighten up.)