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do's and don'ts
The general rules and regulations of a given activity, operation, or situation. Before you begin your first day working for us, there are a few important do's and don'ts that I need to familiarize you with. Tom doesn't understand the basic do's and don'ts of social etiquette.
a rum do
dated An odd, strange, or surprising occurrence, situation, or turn of events, especially one that might be considered somewhat disreputable or distasteful. Primarily heard in UK. A young man taking a wife so much older than himself? My word, what a rum do that is! Well, this is a rum do, if I've ever seen one. The kitchen porter has just been made the head chef!
See also: rum
A phrase used when one is emphasizing their belief that something is fair. Come on, you need to watch the kids tonight because I do it all the time—fair do's.
See also: fair
do's and don'ts
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]
the dos and don'ts
COMMON The dos and don'ts of a particular situation are the things you should and should not do in that situation. Disasters can be avoided if a few general dos and don'ts are considered. The publisher produces a detailed booklet and cassette tape full of dos and don'ts for aspiring authors.
dos and don'tsrules of behaviour.
1999 Alumnus Volunteers are prepared well on…cultural dos and don'ts before they leave for the field to serve.