I'm Sorry, What Did You Just Say?

We went to the new Kidzu Children's Museum in Chapel Hill today. It was great. Apparently they plan rotating exhibits, and the current exhibit was Maurice Sendak. Since S. has quite the thing about "In the Night Kitchen" and "Where the Wild Things Are" she was in seventh heaven. They even had a slide that went down into foam rubber simulating "Chicken Soup and Rice."

I wasn't quite sure about the fact that it is in the very center of Chapel Hill, but as it turned out that was great too, as they work on a "wrist band" system and you can leave and come back. So we left for snacks at Qdoba, and returned when the crowds had eased.

When we went back, the few remaining kids were lined up for the "Chicken Soup and Rice" slide. The little boy in front of S. was fidgety, and his dad told him to sit down to go down the slide. S., ever the parrot, started repeating "sit your bum down, sit your bum down." Suddenly the little boy turned on her and venomously said "b****." I was so startled I wasn't sure I'd heard correctly. His dad seemed unsurprised and said "be nice, she's just telling you to sit down. Now sit down." I was still trying to get my jaw closed, but finally just turned to S. and said "it is his turn S., wait for him to go" and other "be patient" type phrases.

Now I don't have the cleanest mouth, and I'm not easily shocked, but I was shocked. Where does a 2-year-old learn this?