subs. (venery).—An abbreviation of FRENCH LETTER (q.v.).

1

  LETTER-IN-THE-POST-OFFICE. See FLAG.

2

  TO GO AND POST A LETTER, verb. phr. (venery).—To copulate. For synonyms, see GREENS and RIDE.

3

  TO GO ON THE LETTER Q, verb. phr. (old).—See quot.

4

  1819.  J. H. VAUX, Memoirs, p. 185, s.v. LETTER Q, the mace or billiard slum, is sometimes called going on the Q, or the letter Q, alluding to an instrument used in playing billiards.

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