Daddy is a "proton"

A couple of days ago, Miguel put on a belt that used to be Tanner's. Needless to say the belt was very tight on Miguel. It is one of those scout belts, that has the slide thing to tighten it. (Hope that makes sense) Well, then Miguel couldn't loosen it to get it off. I was laughing my guts out at him, and I called him a "retard." Logan heard me say that, and then a few minutes later he said "Daddy you are such a "proton." I have no idea where he has ever heard the word proton, it doesn't usually come up in our home.