Green’s Dictionary of Slang

haberdasher of (nouns and) pronouns n.

[the expanded version is late 17C–18C only]

a schoolmaster; a tutor.

[UK]B.E. Dict. Canting Crew n.p.: Haberdasher of Nouns and Pronouns Schoolmaster or Usher.
[UK]New Canting Dict. [as cit. c.1698].
[UK]Bailey Universal Etym. Eng. Dict. [as cit. c.1698].
[UK]Grose Classical Dict. of the Vulgar Tongue.
[UK]Lex. Balatronicum.
[UK]Egan Grose’s Classical Dict. of the Vulgar Tongue.
[UK]Lytton Pelham I 104: When I first went to Paris, I took a French master [...] This ‘Haberdasher of Pronouns’ was a person of the name of Margot.