Deep-pocketed broskies carrying stacks of US Open Honey Deuces trophies

They’re turning this into the US Bro-pen.

Deep-pocketed day-drinking broskis are turning the otherwise serene US Open into a frat party — and are carrying around stacked cups of demolished, $23 Honey Deuce cocktails as a massive flex.

One group of a eight college pals was toting a 30-cup-tall tower of the tennis tournaments’ iconic alcoholic nectar as they charged into the Louis Armstrong Stadium on Wednesday afternoon to watch Taylor Fritz and Lloyd Harris square off.

The tower of Grey Goose-branded Honey Deuce vodka drinks cost the Westchester college students an eye-watering $460 — and that’s the price before the pack of gentlemen presumably tipped their very patient bartender.

“It’s my first time at any tennis game ever in my entire life. I like to watch some tennis but partying is fun as well,” James Pheleps, of Australia, told The Post.

“We do this at rugby games back home. We are in college. It’s the first week of classes. No one goes. It doesn’t matter. F–k. We are just partying! This is my fifth one. Nothing too crazy,” Pheleps continued.

Should the group of friends successfully hang onto the stack of cups after their Wednesday bender, Pheleps said they plan to take them back to school.

“Use it as a trophy. I just moved into a new house, so I’ll use it as kitchenware,” he said.

Fellow Aussie Hamish Goonan, 21, took the festivities one step further by “shooting the boot” — thanks to another friend who let him use his Nike sneaker after he ditched the commemorative glass.

The pack of rugby players cheered him on as he chugged the altered Honey Deuce outside the stadium, with one shouting: “Straight to the biceps!”

“It tastes like a bit of foot fungus, a bit of salt, a bit of sweat and it’s all protein,” Goonan said, estimating that he had downed “a couple” of the drinks.

He says it’s an Australian tradition called the “shoey.”

“Australian culture is all about a good time. We are not here to stress. We are not here to be angry. We are here to be calm, we are cool people … Everyone knows Aussies are big drinkers, but we are chill guys,” Goonan continued.

“At the moment, I’m here to party … and we’ll be here to watch tennis, but then we’ll be here to party again.”

Michael Donovan, 21, of Queens said he was an honorary Aussie for the night — and celebrated by plopping his glass onto the top of the stack of drinks and drinking from the ever-growing staff.

“I’m not here for a long time, I’m here for a good time,” he said poignantly.

For the bartender serving the rowdy broskis, the stacking sight was nothing out of the ordinary for the annual US Open.

“It’s usually college kids, frat boys and whatever. They just walk around with it like Hacksaw Jim Duggan,” he said, referring to a former professional wrestler who carried a two-by-four plank in the ring.

“As a bartender, they come up to you carrying 20 cups, you might want to cut them off.”