According to Merriam-Webster, Faustian means:
- of, relating to, resembling, or suggesting Faust; especially, made or done for present gain without regard for future cost or consequences.
I might use the word Faustian in a sentence like this:
My Faustian attitude toward eating cinnamon rolls immediately before bedtime has caused me much restlessness, nightmares, and to wake in the morning with the uncomfortable feeling that a giant rock floats in my stomach soup.