I, of course, let him know (as calmly as possible) that it was a bad word and for him not to repeat it. I then inquired as to where he would have picked up this bad word. Without missing a beat, he told me "From the trees". At this point, Justin started to laugh his head off, adding fuel to the F Word flame. Brody kept yelling "fuckin' a bad word?, fuckin' a bad word?", all the while giggling. Justin and Everett kept laughing, and I tried to get the vein in my forehead not to pop all over the dashboard.
Once I calmed them down, I told Everett I knew he did not pick up this word from the trees. If he had, we might be looking into some deep rooted (pun intended) issues. He hasn't repeated it since, I have to assume the trees have fallen silent. This begs the question: If a tree says fuckin in the forest, does a little Everett hear??