Where do they get it?

So, most of the time I don't realize that I say certain things a lot until I realize that my kids are saying them, too.  For example, Liam's favorite thing to say is, "that's annoying".  He came inside the house from playing the other day to tell us that the train he just heard was "annoying".  If a dog barks, a horn honks, the radio is playing, justabout anything...well,that is annoying...to Liam.

He also says, "Oh Man!" a lot, and I do not say that.  We're blaming that one on swiper the fox.