1. To be in an extremely and increasingly bad or ruinous condition; to be on the inevitable path to utter failure or ruin. Our project went to the devil after our funding was cut. With the way he's running things, the company is going to the devil.

2. To fall into moral degradation. It seems like our country is going to the devil! No one has any basic decency anymore.

3. An exclamation of anger, annoyance, or exasperation. If you can't be bothered to run our business like a professional, then you can go to the devil, for all I care!