Jackspeak of the Royal Canadian Navy

Mind your P's and Q's

In the days of sail when sailors were paid a pittance, seamen drank their ale in taverns whose keepers were willing to extend credit until payday. Since many salts were illiterate, keepers kept a tally of pints and quarts consumed by each sailor on a chalkboard behind the bar. Next to each person's name, a mark was made under "P" for pint or "Q" for quart whenever a seaman ordered another draught. Also, on payday, each seaman was liable for each mark next to his name, so he was forced to "mind his P's and Q's" or he would get into financial trouble. To ensure an accurate count by unscrupulous keepers, sailors had to keep their wits and remain somewhat sober. Sobriety usually ensured good behavior, hence the meaning of "mind your P's and Q's".

Added: 2014-11-01 Last modified: 2014-11-01