I really hope these aren't some of the first words you're learning. First one is talking about the Buttocks, if you don't know what that is, google it. The second would refer to breasts.

It's a reference to the show "Friends", the character Joey says this quote the first time he sees Phoebe as a way of complementing her, they both laugh when Joey brings it up in the future as a response when she asks if she's sexy enough.

It means you bought the wrong book!