Bee-Beep!

Piper is quickly beginning to become more familiar with bodily functions lately. She can identify pee and poop, but I have yet to discover exactly what a bee-beep is. If someone passes gas in the house, she announces, "Mommy bee-beep!" One day she just randomly said, "Rah-rah bee-beep!" Uncle Ryan was not at our house and she quickly changed her subject. Now when I change her poopy diapers she calls them bee-beeps. I'm not sure what to believe anymore.