retail therapy 
noun [mass noun] humorous
The practice of shopping in order to make oneself feel more cheerful: stop for a reviving cafe au lait or a glass of wine before setting off for more retail therapy...
- Today James Carleton guides us through that most untested of psychological self-help techniques - retail therapy.
- We stood up, heading off into the busy town for some traditional retail therapy.
- The town itself offers a multitude of upmarket shopping malls to explore retail therapy Malaysian style, alongside plenty of ethnic Chinese, Malay and Indian restaurants to try out local delicacies.