not to mention

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not to mention

1. (idiomatic) An apophasis used by a speaker to introduce, despite claiming not to address, a given point of discussion.

   The city was already having staffing difficulties, not to mention having a three million dollar budget shortfall.

   • 2012, Christoper Zara, Tortured Artists: From Picasso and Monroe to Warhol and Winehouse, the Twisted Secrets of the World's Most Creative Minds, part 1, chapter 2, 51:

     In fact, the immortal tunemeister Irving Berlin wrote all three , along with about 1,500 others, not to mention the scores for eighteen Hollywood films and nineteen Broadway musicals.

   • 2013 June 1, “A better waterworks”, in The Economist‎, volume 407, number 8838, page 5 (Technology Quarterly):

     An artificial kidney these days still means a refrigerator-sized dialysis machine. Such devices mimic […] real kidneys […] . But they are nothing like as efficient, and can cause bleeding, clotting and infection—not to mention inconvenience for patients, who typically need to be hooked up to one three times a week for hours at a time.

• to say nothing of

• apophasis
• let alone
• much less