noun plural Etymology: from the phrase mind one's ~, alluding to the difficulty a child learning to write has in distinguishing between p and q Date: 1779 something (as one's manners) that one should be mindful of , best behavior
P'S AND Q'S
Meaning of P'S AND Q'S in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012