not stand on ceremony
To not observe or hold strictly to protocol or formalities. Hello, ladies and gentlemen. Time is of the essence, so let's get started right away and not stand on ceremony. Please, don't stand on ceremony on my behalf—keep eating!
not stand on ceremony
If you do not stand on ceremony, you act in a relaxed and informal way with someone. Do call me Amelia, dear. We don't stand on ceremony in this family.