1785. Grose. Vulg. Tongue, s.v.
1811. Lexicon Balatronicum, s.v.
Gap, subs. (venery).—The female pudendum: also Sportsman’s gap and water-gap (q.v.). For synonyms, see Monosyllable.
d. 1746. Robertson of Struan, Poems, p. 84. O gracious Hymen! Cure this dire Mishap, Sew up this mighty rent, or fill the gap.
To blow the gap, verb. phr. (old).—The same as to blow the gaff (q.v.).
1821. Egan, Real Life, etc., i., 557. He should like to smack the bit without blowing the gap.
Gaper, subs. (venery).—The female pudendum. Also, Gaper (and Gape) over the Garter. For synonyms, see Monosyllable.
Gapes, subs. (colloquial).—A fit of yawning; also the open mouth of astonishment.
1818. Austen, Persuasion. Another hour of music was to give delight or the gapes. [[118]]
1838. Haliburton, Clockmaker (ed. 1862), p. 373. But what gave me the gapes was the scenes (at the theatre).