"jazz mags" euphemism?

[Douglas G. Wilson]

>For Kevin, "a sticky heap of jazz mags" was "clearly", as he said, a
>euphemism for pornographic magazines. I am aware that the writer, Lucy
>Mangan, is apparently British, so this might be off-topic on ADS-L. On
>the other hand, there's just such a wealth of expertise on "jazz" here.
>
>Do you agree with Kevin Marks' assessment? Is this a common euphemism?

I see this ("jazz mag" = "porno magazine") in Green's Cassell slang
dictionary. It's found on the Web, on Usenet since (at a glance) 1992, with
some indication that it's mostly a UK-ism.

I don't recall ever encountering this term myself.

-- Doug Wilson