Me: "Do you want butter on your bread?"
Gavriel Zev: "Budder right here?"
Everything he says has a question mark on the end.
Still - a real sentence!
It's the first I've heard with more than 2 words, even though a linguist would probably argue that he hears "right here" together so often it's functioning as a single word in this context.
I guess that's why I don't hang out with a lot of linguists.