Zip it!

On the way home from school today Sophia told me that she was crying in time out and Ms. Lisa told her to "zip it". Does she even know what that means? I'm not sure. I asked her what she did to be placed in time out. She told me she was running in the big room (that's their indoor recess room). I thought it was kind of funny that she was ratting out her teacher, but I didn't want her to see me chuckling.