1725. New Cant. Dict., s.v. Lock, as He stood a queer lock; i.e.,
He stood an indifferent chance.
1748. T. Dyche, Dictionary (5th ed.). Lock (S.) ... also a cant
word.... He stood a queer lock or bad chance.
1785. Grose, Vulg. Tongue, s.v. Lock, He stood a queer lock; i.e.
he bore but an indifferent character.
1859. Matsell, Vocabulum, s.v.
5. (venery).—The female pudendum. For synonyms see Monosyllable. Also
lock of all locks: cf. Key = penis.
1772. G. A. Stevens, Songs Comic and Satyrical, 88. Here’s the lock
of all locks, and unlocking the same.