go to pot

verb2

1. •
   (figurative) To come to ruin, especially to decline or deteriorate.

   • They haven't been maintaining it, and the downtown area has really gone to pot over the past 20 years.
2. •
   (no longer used) Go to hell; an angry dismissal.

   • At this moment the rabbit sprang from his arms and disappeared among the brush wood. "Go to pot," said the man, "you are a good-for-nothing dry-meated beast, to make the best of you." — 1837