off-limits

[ awf-lim-its, of- ]

/ ˈɔfˈlɪm ɪts, ˈɒf- /

forbidden to be patronized, frequented, used, etc., by certain persons: The tavern is off-limits to soldiers.

Origin of off-limits

An Americanism dating back to 1950–55

Although the blood-spattered offices will be off-limits, staff have vowed to continue producing the magazine.

France Mourns—and Hunts |Nico Hines, Christopher Dickey |January 8, 2015 |DAILY BEAST
Unfortunately, the underground tunnels that were used to transport booze and, if necessary, escaping patrons, are off-limits.

The Bars That Made America Great |Nina Strochlic |December 28, 2014 |DAILY BEAST
Most art worlders are likely, I think, to agree that absolutely nothing should be off-limits for art or literature.

The Life and Art of Radical Provocateur—and Commune Leader—Otto Muehl |Anthony Haden-Guest |September 22, 2014 |DAILY BEAST
Plus, almost all of the grow rooms in Colorado are currently off-limits to the public.

Welcome to the Jungle: Pot Tourism |Abby Haglage, Caitlin Dickson |February 3, 2014 |DAILY BEAST

In other words, “Bad Ass Vodka” and high-end handbags are off-limits.

U.S. Investigating Dennis Rodman for Busting Sanctions |Josh Rogin |January 24, 2014 |DAILY BEAST
This section of the building was off-limits to the other patients in the Institute, but Stanton, the star border, had free rein.

Anything You Can Do |Gordon Randall Garrett
Those are complicated machines, those things, and they're off-limits to the likes of you and me.

Little Brother |Cory Doctorow
Commanders were frequently quizzed on the probable effects of the imposition of off-limits sanctions or base closings.

Integration of the Armed Forces, 1940-1965 |Morris J. MacGregor, Jr.