high on life

adjective2

1. •
   (humorous) Extremely happy with life, especially as the result of terminating an addiction.

   • I used to get high on drugs — now I get high on life!
   • Asker: What? Are you high? / Answerer: High on life!
2. •
   (humorous) Experiencing a state of sobriety as an alternative to or replacement for physical intoxication.