jazz mags 

Magazines that contain images of the female species in various states of undress.

In some cases these images include red jacket shots

"Oh bollocks Dad, have you been borrowing my jazz mags again"

jazz mags by Marko The Great September 7, 2004

jazz mags 

Another more subtle way of saying pornographic magazines

Aww but Mrs my mum found my Jazz mags underneath my pillow last night!

jazz mags by Master Patrick Claire Thompson August 5, 2006