This is a sentence uttered to me in real life
My wife teaches undergrad art, and I was talking to one of her students, who is hilarious, about making your own website. She had some experience with that kind of thing, but still felt like she didn't really know what she was doing. I was answering her questions, and then she stopped, and said that she wanted to find more people who wanted to make websites, because she mainly talked about it with fellow art students. She said something like "When I talk about programming with art students, sometimes I feel like I know what I'm doing." Then she said the following thing, which made my brain pinwheel:
but really I'm just a dumb child in dog school.
After my brain came back online, and after unpacking it with her, I knew that this phrase would be with me for the rest of my life.