retail therapy
US /ˈriː.teɪl ˌθer.ə.pi/
UK /ˈriː.teɪl ˌθer.ə.pi/

1.
the act of buying special things for oneself in order to feel happier
:
•
After a stressful week, she indulged in some retail therapy.
•
I need some serious retail therapy to lift my spirits.