Middle Son eats a lot. Given that he is fifteen, this is not a surprise.
This weekend, as he sat down at the dinner table for about the 5th time, My Beloved Wife commented that he was having a bottomless pit weekend.
The she asked him if he was a bottomless pit. To our amusement and surprise, he signed "yes."
I'm never sure how much language Middle really understands, but in that moment it sure looked like he understood the question.