リップサービス

noun

lip service; empty flattery; sweet talk

Wasei-eigo from English 'lip service'. Used for insincere compliments or flattering words, often in social or business contexts. Unlike English, it can also refer to playful or teasing flattery.

• 彼かれの褒ほめ言こと葉ばはただのリップサービスだよ。

  His compliments are just lip service.

• 上じょう司しはリップサービスが上手うまい。

  The boss is good at sweet talk.