not to mention something

not to mention

In addition to or as well as what's been discussed. Typically used to mention an additional item when listing things that one considers negative. I've already got to spend three hours in the car running errands, not to mention the hour and a half it will take to pick up the kids from school. They have two massive houses in the city, not to mention their vacation home by the beach.
See also: mention, not
Farlex Dictionary of Idioms.

not to mention something

used to introduce extra information and emphasize what you are saying: He’s got a house in London and a cottage in the country, not to mention the villa in Spain.
See also: mention, not, something
Farlex Partner Idioms Dictionary
See also:
  • not to mention
  • not to speak of
  • trade in
  • trade (something) in for (something)
  • trade (something) in on (something)
  • item
  • (one's) money's worth
  • be an item
  • be somebody's middle name
  • be (one's) middle name
References in periodicals archive
I think that the decision will be made taking into account the long-standing good relations between Russia and Israel, and therefore a sharp u-turn like the abolition of a visa-free regime, not to mention something more serious, is hardly possible here," he stated.
THERE will be some ghostly goings on in Huddersfield during half term, not to mention something horrible lurking in the Lawrence Batley Theatre.
ALOT of water has flowed under a lot of bridges since 10cc first made their mark in the early 60s - not to mention something in the region of 30 million albums.
"It's a tribute to them really, not to mention something that constantly helps to inspire me in my work," he adds.
Being a role model within a company, especially from an upper management position, gives employees the kind of buy-in they need to reach their potential, not to mention something to strive for on a long-term basis.
Something casual for a day out with the kids, something hot for a night out on the town - not to mention something cool and trendy that can flick from one to the other in the blink of an eye.
The document is riddled with ambiguities, not to mention something like two dozen avenues that lead to legalistic dead-ends.
We have email and video conferencing, not to mention something called a telephone."
You can support things on a whole different level than we've been able to in the past, not to mention something like Katrina or Rita or something that looks a whole lot like homeland defense or homeland security--to be able to move small teams quickly.
Not to mention something that borders on the insane - a contest to crown a new slug queen.
Given the recent overwhelming focus on corporate accountability and governance by financial analysts, economists, and CPAs alike, I think I would be remiss not to mention something about business ethics in an introductory accounting course.
Our hope is that it will be stylish, sexy, intelligent, rich and hypnotically dark." Not to mention something "Dance of the Vampires" never was--very successful.
APPLICANTS hoping to follow Ian McLeod into the Celtic Park hot- seat will require bags of skill, experience, energy and business acumen - not to mention something of a death wish.
Not to mention something that's been through the shredder.
We're talking saving lives here, not to mention something Congress claims to understand: money.