Posted by R. Berg on October 30, 2002
In Reply to: Mind your P's and Q's? posted by Stan on October 30, 2002
: "Mind your P's and Q's." Can someone please tell me what this means and where it originated? Thank you!
It means "Behave properly." A previous discussion contains several proposals about its origin: https://www.phrases.org.uk/bulletin_board/13/messages/1416.html (link below).