Green’s Dictionary of Slang

lint-scraper n.

also lint
[SE lint, the cotton that bandages are made of]

a junior surgeon.

[UK]Foote Mayor of Garrat in Works (1799) I 162: Dramatis Personae, Lint, a surgeon.
[UK]Thackeray Lovel the Widower 216: If Miss Prior [...] prefers this lint-scraper to me, ought I to baulk at her?
[UK]Sl. Dict.