Perhaps they were talking about Club Penguin? See the Related Link.
they're just trying to show off without getting in trouble.
Just Kidding Around
It may have come from a Spanish word meaning "fat one", or from Welsh pen gwyn, meaning "white head", or from pinguis, meaning "fat" in Latin.
Of course they can't. The closest you will get to talking penguins is club penguin.
The thing is you can't talk to a penguin its impossible but you can talk to dogs.