1
general::
Phrase(s): do’s and don’ts
the rules; the things that should be done and those that should not be done. • I must admit that a lot of do’s and don’ts at this company are hard for me to understand. • Better learn the do’s and don’ts immediately.
McGrawhill's American Idioms And Phrasal Verbs
2
general::
Rules or customs concerning some activity, as in It's important to know the do's and don'ts of diplomatic receptions. This expression alludes to what one should and should not do or say. [c. 1900]
American Heritage Idioms