Web Results
The phrase "mind your p's and q's" has a few possible origins. It may have meant "mind your pints and quarts" while tallying up bar tabs, or it may have been a warning to printers to avoid confusing the two lowercase letters, which can look alike.

en.wikipedia.org/wiki/Mind_your_Ps_and_Qs

Mind your Ps and Qs is an English expression meaning "mind your manners", " mind your ... this case the proper spelling of the phrase should be "note your p's and q's", because the distinction of majuscule P and Q does not pose a problem.

blog.oxforddictionaries.com/2012/01/origin-to-mind-your-ps-and-qs

Jan 9, 2012 ... If you have you ever been told to mind your Ps and Qs, it might have struck you as a rather odd thing to do. So where does the phrase come from? ... Ps and Qs, meaning be on your best behaviour, or (in the USA) on your toes; ...

www.phrases.org.uk/meanings/mind-your-ps-and-qs.html

Mind your Ps and Qs. Meaning. Be on your best behaviour; be careful of your language. Ps and Qs are just the plurals of the letters P and Q. There is some ...

www.quickanddirtytips.com/education/grammar/what-does-mind-your-ps-and-qs-mean

Jun 18, 2015 ... There are multiple delightful and unproven theories about the origin of the phrase Mind your p's and q's. My favorite is that bartenders used to ...

mentalfloss.com/article/72122/what-exactly-are-your-ps-and-qs-and-why-do-you-have-mind-them

Dec 8, 2015 ... How Much Do You Know About Dress Codes? ... bit like “thank yous,” so to mind your p's and q's ultimately means “to mind your good manners.

www.urbandictionary.com/define.php?term=P%27s%20and%20Q%27s

Mind your Ps and Qs means to watch your manners, or be careful how you behave. ... as they tend to do in pubs, you'd normally hear something like "Mind your ...

www.snopes.com/language/phrases/pqs.asp

Jun 13, 2010 ... The etymology of the phrase 'Mind your p's and q's.' ... the saying had started out with the same meaning it now carries: “Mind your manners.”.

www.businessinsider.com/where-the-phrase-mind-your-ps-and-qs-comes-from-2015-6

Jun 20, 2015 ... I've heard people say that it means “mind your pleases and your thank ... do use apostrophes to make single letters plural such as P and Q. The ...

dictionary.cambridge.org/us/dictionary/english/mind-your-p-s-and-q-s

mind your p's and q's definition, meaning, what is mind your p's and q's: to make an effort to be especially polite in a particular situation: . Learn more.