Mind your Ps and Qs

Uncommon card · No. 112348

Mind your P's and Q's is an English language expression meaning "mind your manners", "mind your language", "be on your best behaviour", or "watch what you're doing". Attempts at explaining the origin of the phrase go back to the mid-19th century. One explanation favoured in a letter to the editors of Notes and Queries dated 1851, is a literal interpretation of the saying, regarding possible confusion between the lowercase letters p and q in schoolwork or typesetting. This is mentioned in the 3rd edition Oxford English Dictionary, but the dictionary considers the explanation unlikely since "the chronology of the senses would argue against this, and no such connotation is evident in the earliest quotations" and says that the origin of the expression is unknown. According to Michael Quinion, "investigations by the Oxford English Dictionary in 2007 when revising the entry turned up early examples of the use of Ps and Qs to mean learning the alphabet. The first is in a poem by Charles Churchill...

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