Where do they learn it?

I wonder sometimes where my kids pick up the things they say. Just this morning we were in the car and Brock heard the djs on the radio start cheering about something and he put his hands up in the air and yelled "MAKE SOME NOISE." Now typically this is only heard at basketlball games or other sporting events, which we really haven't been to any major sporting events this year with the kids. Maybe he heard it at daycare, because I certainly now that we don't go around the house saying "MAKE SOME NOISE!"