To sell straws on the streets in order to cover the giving to the purchaser of things usually banned, such as pornography.
It was the custom for the disaffected of those days to make known their grievances by distributing papers on doors of public buildings, and even strawing them in the high way, for the benefit of the chance passenger.
I have already alluded to "strawing," which can hardly be described as quackery. It is rather a piece of mountebankery. […] The strawer offers to sell any passer by in the streets a straw and give the purchaser a paper which he dares not sell. Accordingly as he judges of the character of his audience, so he intimates that the paper is political, libellous, irreligious, or indecent.