subs. phr. (old).—A book containing indelicate or ‘smutty’ pictures.
1708. Post-Man, 8 June. Last Sunday a person did pennance in the Chapterhouse of St. Paul’s, London, for publickly shewing in Bartholomew Fair a book called a BLOW-BOOK, in which were many obscene and filthy pictures: the book was likewise burnt, and the person paid costs.
