When I stopped by to pick up Mr M and take him to school, he was being scolded for something he'd done (or maybe something he was supposed to do but didn't, I'm not sure because I just caught the tail end of it).
While his mom was finishing what she had to say, Mr M rolled his eyes and said, "Oh my gosh!"
Ex: You've been saying that to me way too much lately. I want you to stop saying that.
Mr M: Oh my gosh, Mom.
Ex: I told you not to say that.
Mr M: Oh my gosh. 'Oh my gosh' is just 'oh my gosh.' It's not a swear word. Look it up.
Ex: I don't care if it's not a swear word. I want you to quit saying it to me. Now brush your teeth.
Mr M: You brush your teeth.
Ex: What did you just say to me?
Mr M: Nothing.
Ex: That's what I thought.
Mr M (waiting until she'd walked a safe enough distance out of the room): YOU BRUSH YOUR TEETH!