stand on ceremony
US /stænd ɑn ˈser.əˌmoʊ.ni/
UK /stænd ɑn ˈser.əˌmoʊ.ni/

1.
격식을 차리다, 체면을 세우다
to behave in a formal way, or to insist on formal behavior from others, especially when it is not necessary or appropriate
:
•
Please don't stand on ceremony; just make yourself at home.
제발 격식을 차리지 마세요; 편하게 계세요.
•
There's no need to stand on ceremony with old friends.
오랜 친구들과는 격식을 차릴 필요 없어.