Literally.
Dinner would be buck or doe, hart or hind- maybe even a- Red eyes caught sight of the tiny thing. Not a fawn but smaller? A morsel. A snack. A thing to chase and catch and eat. Overall, something he could eat at the end of the day so what did it matter. The small wooded area outside of the school didn't explicitly say not hunting anyway so...
A low growl, the ghost wanted a challenge, a chase. Red eyes alight with hunger, he hoped the tiny deer would dash.
Once caught, Frost planned to dine*
*not in hell
Nerpin