Dictionary / Vocabulary / 社交辞令
しゃこうじれい
something said for politeness' sake; diplomatic language; honeyed words; lip service
今私は母親が人前で社交辞令をつかっていたにすぎないと理解しました。
Now I understand that my mother was only trying to be polite in public.
君の言っていることはただの社交辞令だよ。
You're just being diplomatic.