1
general::
Phrase(s): Do sit down.
Don’t stand on ceremony.; Please sit down. (A polite phrase encouraging people to resume their seats after rising for an introduction or out of deference.) • Tom rose when Mary approached the table, but she said graciously, "Do sit down. I just wanted to thank you again for the lovely gift." • Tom: Hello, Bill. Bill (rising): Hi, Tom. Tom (standing): Do sit down. I just wanted to say hello.
McGrawhill's American Idioms And Phrasal Verbs