Meaning of “lip-service” - Learner’s Dictionary

lip-service

noun [ no plural ] uk us /ˈlɪpsɜːvɪs/
give/pay lip-service to sth informal

to say that you support an idea or plan, but not do anything to help it succeed:

Although everyone pays lip-service to it, nobody talks seriously about cleaning up the environment.

(Definition of “lip-service” from the Cambridge Learner’s Dictionary © Cambridge University Press)