lip service
US /ˈlɪp ˌsɜːr.vɪs/
UK /ˈlɪp ˌsɜːr.vɪs/
1.
an expression of agreement or respect that is not accompanied by real conviction or action
:
•
Many politicians pay lip service to environmental protection but do little to implement policies.
•
She paid lip service to the idea of teamwork, but always worked independently.