Knicks fans brushed off their team’s blowout loss to the Boston Celtics in Game 5 — and still talked trash to their rival’s fanbase outside TD Garden Wednesday night.

“F–k Boston,” said Brooklyn resident Rick Haddad, 18, outside the Beantown venue. “It’s the worst city in America. Worst people, worst culture, worst sports team.”

His buddy Edward Dweck then took a shot at the Celtics’ home arena.

“This is a fake garden. This is a p—y-ass garden,” the 18-year-old Brooklynite yapped. “I’ve never heard of TD Garden, only Madison [Square] Garden and the Botanical [Garden].”

The Brooklyn pals were among scores of fans who were still defiant after New York lost 127-102, which will stretch the series to at least six games.

The Knickerbockers are still up 3-2.

“You ain’t been paying attention,” Kevin Shah huffed.

“You don’t see patterns. Game f–king 6 at home. It’s gotta be.”

“The formula is you go all do your thing and you get cocky, and we punch you in the mouth without knowing it,” said Shah, a Bronxville native who now lives in Ohio.

“The whole time it’s been the formula, dog,” he continued to rant. “Every time they got full of themselves, they got met with a reality check, bitch.”

Even Mayor Eric Adams got involved with a two-word response to the disappointing loss.

“BUCK FOSTON,” Hizzoner tweeted.

Another fan outside TD Garden, David G., shouted “Knicks in six” for several minutes as fans left the venue.

“It’s OK. We are good, buddy,” he said. “Knicks in six. We are good.”

“I’m getting a lot of f–k yous, but I don’t care,” he added as a pair of Boston fans told him to pipe down.

“We just kicked your ass! Jesus. Shut the f–k up!” an angry Celtics fan shouted at him while another screamed, “You smell like s–t.”

A group of girls decked out in Knicks jerseys also felt the wrath of some insufferable Boston fans who shouted, “Keep walking! Go home! Go back to New York!”

Back in the Empire State outside MSG, fans were clamoring for another shot at the Celtics.  

“Jaylen Brown thinks he’s all hot s–t. He f–king sucks, bro,” Nia Newkirk, 25, said of the Boston guard.

“He is not the best driver in the NBA. He’s not the best driver on his team, bro. You needed [Boston forward] Jayson Tatum. Y’all got f–king lucky tonight. Knicks in six.”

The series heads back to the Big Apple for Game 6 Friday night, where the Knicks will have another shot to close out the Celtics and advance to the Eastern Conference Finals.

“I don’t care about Boston. Boston’s a bitch,” said Bronx resident Damion Jones, 30. “They, they always be a bitch … Oh, man, f–k Boston. We lost because of us. Yes, we lost because of us.” 

Hoboken resident Liam Walker, who rooted for the Knicks inside the watch party inside the world’s most famous arena, predicted beldam if New York took Game 5 or wins Friday.  

“I mean, there’s like way more people here [inside the Garden on Friday], they’ll be like hundreds of people outside, like it would be people going like crazy,” he said.

“It would just be like a riot in the streets. It would be awesome.”