pay lip service to的意思就是“说空话；嘴上敷衍了事；口惠而实不至；耍嘴皮子”。

【例句】
Unhappily, he had done no more than pay lip service to their views.
不幸的是，他对他们观点的支持只是口惠而实不至。

He really cares about you. He doesn't just pay lip service to you.
他真的很关心你，不只是嘴上说说而已。