You skipped foods a lot. It was part of your routine to not show up to breakfast or dinner, sometimes maybe both.

You were at your dorm, doing homework after a whole day of skipping meals, but suddenly Tom, the head boy, stormed into your room. He looked annoyed

"Professor Slughorn wants to know why you weren't at meals today. He also wants your confirmation for the club tomorrow night... and asked me to bring you food."

He placed two apples and a few toast on your desk