Ex-'RHOC' Son Busted for Jailhouse Booze ... No Pruno For You!!

11/21/2016 12:20 AM PST

Joshua Waring Busted For Jail Booze

EXCLUSIVE

The son of former 'RHOC' star Lauri Peterson got busted -- while already behind bars -- for hoarding prison wine in his cell, so now he's facing a new felony.

Law enforcement tells us ... Joshua Waring had the alcoholic beverage -- known as "pruno" in the can -- stashed in his bunk at an Orange County jail. We're told he's been charged with possession of contraband in a correctional facility.

Waring's in lockup awaiting trial for attempted murder, and is also facing a lawsuit from the man he allegedly shot.

Fun fact: Pruno is made with fruit, ketchup, sugar, milk and bread ... and is commonly mixed in toilet bowls. Before you whip some up for a holiday party -- it's been described as bile flavored.