Usage of name calling (idiot, dumb, jerk, stupid, etc.) And a boy is contently making bodily related humor/refrences about his dad.
In one episode, Teddy tells her dad that her uncle Mel used a reference which meant "kiss my ass".
In "Teddy on Ice", they talk about Charlie saying a cus word most of the episode, but it was never revealed. In the car, Amy says it after getting mad, but the horn was honked, so it was blocked out.
In the season 1 finale, it's heavily implied that Teddy gets flipped off while she is driving Mrs. Dabney around, but it doesn't reveal who flipped her off, and we don't see it.